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Finding the Fourth Proportional to 75,207.60, 112,811.40 and 74,689.20

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Solution

The fourth proportional to 75,207.60, 112,811.40 and 74,689.20 is: 112,033.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,207.60 : 112,811.40 = 74,689.20 : x
  2. Step 2: Convert to fraction form
    75,207.60/112,811.40 = 74,689.20/x
  3. Step 3: Cross multiply
    75,207.60x = 112,811.40 × 74,689.20
  4. Step 4: Simplify right side
    75,207.60x = 8,425,793,216.88
  5. Step 5: Solve for x
    x = 8,425,793,216.88/75,207.60
  6. Step 6: Final answer
    x = 112,033.80

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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.