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Finding the Fourth Proportional to 72,157.90, 99,513.42 and 45,302.92

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Solution

The fourth proportional to 72,157.90, 99,513.42 and 45,302.92 is: 62,477.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,157.90 : 99,513.42 = 45,302.92 : x
  2. Step 2: Convert to fraction form
    72,157.90/99,513.42 = 45,302.92/x
  3. Step 3: Cross multiply
    72,157.90x = 99,513.42 × 45,302.92
  4. Step 4: Simplify right side
    72,157.90x = 4,508,248,505.19
  5. Step 5: Solve for x
    x = 4,508,248,505.19/72,157.90
  6. Step 6: Final answer
    x = 62,477.55

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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.