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Finding the Fourth Proportional to 78,524.82, 108,363.11 and 42,715.12

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Solution

The fourth proportional to 78,524.82, 108,363.11 and 42,715.12 is: 58,946.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,524.82 : 108,363.11 = 42,715.12 : x
  2. Step 2: Convert to fraction form
    78,524.82/108,363.11 = 42,715.12/x
  3. Step 3: Cross multiply
    78,524.82x = 108,363.11 × 42,715.12
  4. Step 4: Simplify right side
    78,524.82x = 4,628,743,247.22
  5. Step 5: Solve for x
    x = 4,628,743,247.22/78,524.82
  6. Step 6: Final answer
    x = 58,946.24

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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.