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Finding the Fourth Proportional to 42,007.36, 63,019.68 and 28,865.92

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Solution

The fourth proportional to 42,007.36, 63,019.68 and 28,865.92 is: 43,304.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,007.36 : 63,019.68 = 28,865.92 : x
  2. Step 2: Convert to fraction form
    42,007.36/63,019.68 = 28,865.92/x
  3. Step 3: Cross multiply
    42,007.36x = 63,019.68 × 28,865.92
  4. Step 4: Simplify right side
    42,007.36x = 1,819,121,041.31
  5. Step 5: Solve for x
    x = 1,819,121,041.31/42,007.36
  6. Step 6: Final answer
    x = 43,304.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.