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Finding the Fourth Proportional to 74,763.90, 112,143.42 and 30,377.52

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Solution

The fourth proportional to 74,763.90, 112,143.42 and 30,377.52 is: 45,565.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,763.90 : 112,143.42 = 30,377.52 : x
  2. Step 2: Convert to fraction form
    74,763.90/112,143.42 = 30,377.52/x
  3. Step 3: Cross multiply
    74,763.90x = 112,143.42 × 30,377.52
  4. Step 4: Simplify right side
    74,763.90x = 3,406,638,983.92
  5. Step 5: Solve for x
    x = 3,406,638,983.92/74,763.90
  6. Step 6: Final answer
    x = 45,565.29

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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.