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Finding the Fourth Proportional to 71,750.25, 99,012.45 and 39,918.45

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Solution

The fourth proportional to 71,750.25, 99,012.45 and 39,918.45 is: 55,085.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,750.25 : 99,012.45 = 39,918.45 : x
  2. Step 2: Convert to fraction form
    71,750.25/99,012.45 = 39,918.45/x
  3. Step 3: Cross multiply
    71,750.25x = 99,012.45 × 39,918.45
  4. Step 4: Simplify right side
    71,750.25x = 3,952,423,534.70
  5. Step 5: Solve for x
    x = 3,952,423,534.70/71,750.25
  6. Step 6: Final answer
    x = 55,085.85

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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.