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Finding the Fourth Proportional to 71,530.80, 98,710.50 and 39,265.40

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Solution

The fourth proportional to 71,530.80, 98,710.50 and 39,265.40 is: 54,185.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,530.80 : 98,710.50 = 39,265.40 : x
  2. Step 2: Convert to fraction form
    71,530.80/98,710.50 = 39,265.40/x
  3. Step 3: Cross multiply
    71,530.80x = 98,710.50 × 39,265.40
  4. Step 4: Simplify right side
    71,530.80x = 3,875,906,773.15
  5. Step 5: Solve for x
    x = 3,875,906,773.15/71,530.80
  6. Step 6: Final answer
    x = 54,185.15

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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.