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Finding the Fourth Proportional to 158,305.66, 218,462.16 and 85,709.32

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Solution

The fourth proportional to 158,305.66, 218,462.16 and 85,709.32 is: 118,279.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,305.66 : 218,462.16 = 85,709.32 : x
  2. Step 2: Convert to fraction form
    158,305.66/218,462.16 = 85,709.32/x
  3. Step 3: Cross multiply
    158,305.66x = 218,462.16 × 85,709.32
  4. Step 4: Simplify right side
    158,305.66x = 18,724,243,179.33
  5. Step 5: Solve for x
    x = 18,724,243,179.33/158,305.66
  6. Step 6: Final answer
    x = 118,279.05

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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.