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Finding the Fourth Proportional to 72,744, 100,387.80 and 44,443.68

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Solution

The fourth proportional to 72,744, 100,387.80 and 44,443.68 is: 61,332.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,744 : 100,387.80 = 44,443.68 : x
  2. Step 2: Convert to fraction form
    72,744/100,387.80 = 44,443.68/x
  3. Step 3: Cross multiply
    72,744x = 100,387.80 × 44,443.68
  4. Step 4: Simplify right side
    72,744x = 4,461,603,259.10
  5. Step 5: Solve for x
    x = 4,461,603,259.10/72,744
  6. Step 6: Final answer
    x = 61,332.94

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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.