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Finding the Fourth Proportional to 72,459.81, 99,952.11 and 45,559.71

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Solution

The fourth proportional to 72,459.81, 99,952.11 and 45,559.71 is: 62,845.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,459.81 : 99,952.11 = 45,559.71 : x
  2. Step 2: Convert to fraction form
    72,459.81/99,952.11 = 45,559.71/x
  3. Step 3: Cross multiply
    72,459.81x = 99,952.11 × 45,559.71
  4. Step 4: Simplify right side
    72,459.81x = 4,553,789,145.49
  5. Step 5: Solve for x
    x = 4,553,789,145.49/72,459.81
  6. Step 6: Final answer
    x = 62,845.72

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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.