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Finding the Fourth Proportional to 72,488.64, 100,033.12 and 42,291.52

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Solution

The fourth proportional to 72,488.64, 100,033.12 and 42,291.52 is: 58,361.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,488.64 : 100,033.12 = 42,291.52 : x
  2. Step 2: Convert to fraction form
    72,488.64/100,033.12 = 42,291.52/x
  3. Step 3: Cross multiply
    72,488.64x = 100,033.12 × 42,291.52
  4. Step 4: Simplify right side
    72,488.64x = 4,230,552,695.14
  5. Step 5: Solve for x
    x = 4,230,552,695.14/72,488.64
  6. Step 6: Final answer
    x = 58,361.60

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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.