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Finding the Fourth Proportional to 71,240, 98,302.70 and 39,404.57

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Solution

The fourth proportional to 71,240, 98,302.70 and 39,404.57 is: 54,373.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,240 : 98,302.70 = 39,404.57 : x
  2. Step 2: Convert to fraction form
    71,240/98,302.70 = 39,404.57/x
  3. Step 3: Cross multiply
    71,240x = 98,302.70 × 39,404.57
  4. Step 4: Simplify right side
    71,240x = 3,873,575,426.32
  5. Step 5: Solve for x
    x = 3,873,575,426.32/71,240
  6. Step 6: Final answer
    x = 54,373.60

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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.