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Finding the Fourth Proportional to 90,487.84, 124,847.94 and 71,308.12

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Solution

The fourth proportional to 90,487.84, 124,847.94 and 71,308.12 is: 98,385.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,487.84 : 124,847.94 = 71,308.12 : x
  2. Step 2: Convert to fraction form
    90,487.84/124,847.94 = 71,308.12/x
  3. Step 3: Cross multiply
    90,487.84x = 124,847.94 × 71,308.12
  4. Step 4: Simplify right side
    90,487.84x = 8,902,671,887.27
  5. Step 5: Solve for x
    x = 8,902,671,887.27/90,487.84
  6. Step 6: Final answer
    x = 98,385.28

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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.