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Finding the Fourth Proportional to 72,151.90, 99,505.15 and 45,296.91

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Solution

The fourth proportional to 72,151.90, 99,505.15 and 45,296.91 is: 62,469.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,151.90 : 99,505.15 = 45,296.91 : x
  2. Step 2: Convert to fraction form
    72,151.90/99,505.15 = 45,296.91/x
  3. Step 3: Cross multiply
    72,151.90x = 99,505.15 × 45,296.91
  4. Step 4: Simplify right side
    72,151.90x = 4,507,275,824.09
  5. Step 5: Solve for x
    x = 4,507,275,824.09/72,151.90
  6. Step 6: Final answer
    x = 62,469.26

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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.