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Finding the Fourth Proportional to 71,999.39, 99,354.51 and 39,734.30

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Solution

The fourth proportional to 71,999.39, 99,354.51 and 39,734.30 is: 54,830.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,999.39 : 99,354.51 = 39,734.30 : x
  2. Step 2: Convert to fraction form
    71,999.39/99,354.51 = 39,734.30/x
  3. Step 3: Cross multiply
    71,999.39x = 99,354.51 × 39,734.30
  4. Step 4: Simplify right side
    71,999.39x = 3,947,781,409.92
  5. Step 5: Solve for x
    x = 3,947,781,409.92/71,999.39
  6. Step 6: Final answer
    x = 54,830.77

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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.