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Finding the Fourth Proportional to 78,997.46, 109,019.16 and 43,186.76

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Solution

The fourth proportional to 78,997.46, 109,019.16 and 43,186.76 is: 59,599.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,997.46 : 109,019.16 = 43,186.76 : x
  2. Step 2: Convert to fraction form
    78,997.46/109,019.16 = 43,186.76/x
  3. Step 3: Cross multiply
    78,997.46x = 109,019.16 × 43,186.76
  4. Step 4: Simplify right side
    78,997.46x = 4,708,184,298.32
  5. Step 5: Solve for x
    x = 4,708,184,298.32/78,997.46
  6. Step 6: Final answer
    x = 59,599.19

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.