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Finding the Fourth Proportional to 72,291.69, 99,766.35 and 45,424.26

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Solution

The fourth proportional to 72,291.69, 99,766.35 and 45,424.26 is: 62,687.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,291.69 : 99,766.35 = 45,424.26 : x
  2. Step 2: Convert to fraction form
    72,291.69/99,766.35 = 45,424.26/x
  3. Step 3: Cross multiply
    72,291.69x = 99,766.35 × 45,424.26
  4. Step 4: Simplify right side
    72,291.69x = 4,531,812,621.65
  5. Step 5: Solve for x
    x = 4,531,812,621.65/72,291.69
  6. Step 6: Final answer
    x = 62,687.88

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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.