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Finding the Fourth Proportional to 75,275.70, 112,913.55 and 74,109.30

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Solution

The fourth proportional to 75,275.70, 112,913.55 and 74,109.30 is: 111,163.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,275.70 : 112,913.55 = 74,109.30 : x
  2. Step 2: Convert to fraction form
    75,275.70/112,913.55 = 74,109.30/x
  3. Step 3: Cross multiply
    75,275.70x = 112,913.55 × 74,109.30
  4. Step 4: Simplify right side
    75,275.70x = 8,367,944,151.02
  5. Step 5: Solve for x
    x = 8,367,944,151.02/75,275.70
  6. Step 6: Final answer
    x = 111,163.95

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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.