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Finding the Fourth Proportional to 72,073.80, 99,465.84 and 40,242.96

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Solution

The fourth proportional to 72,073.80, 99,465.84 and 40,242.96 is: 55,537.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,073.80 : 99,465.84 = 40,242.96 : x
  2. Step 2: Convert to fraction form
    72,073.80/99,465.84 = 40,242.96/x
  3. Step 3: Cross multiply
    72,073.80x = 99,465.84 × 40,242.96
  4. Step 4: Simplify right side
    72,073.80x = 4,002,799,820.49
  5. Step 5: Solve for x
    x = 4,002,799,820.49/72,073.80
  6. Step 6: Final answer
    x = 55,537.52

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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.