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Finding the Fourth Proportional to 74,748, 112,122 and 28,022.88

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Solution

The fourth proportional to 74,748, 112,122 and 28,022.88 is: 42,034.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,748 : 112,122 = 28,022.88 : x
  2. Step 2: Convert to fraction form
    74,748/112,122 = 28,022.88/x
  3. Step 3: Cross multiply
    74,748x = 112,122 × 28,022.88
  4. Step 4: Simplify right side
    74,748x = 3,141,981,351.36
  5. Step 5: Solve for x
    x = 3,141,981,351.36/74,748
  6. Step 6: Final answer
    x = 42,034.32

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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.