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Finding the Fourth Proportional to 71,748.32, 99,014.02 and 39,920.18

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Solution

The fourth proportional to 71,748.32, 99,014.02 and 39,920.18 is: 55,090.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,748.32 : 99,014.02 = 39,920.18 : x
  2. Step 2: Convert to fraction form
    71,748.32/99,014.02 = 39,920.18/x
  3. Step 3: Cross multiply
    71,748.32x = 99,014.02 × 39,920.18
  4. Step 4: Simplify right side
    71,748.32x = 3,952,657,500.92
  5. Step 5: Solve for x
    x = 3,952,657,500.92/71,748.32
  6. Step 6: Final answer
    x = 55,090.59

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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.