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Finding the Fourth Proportional to 75,275.38, 112,913.12 and 19,119.70

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Solution

The fourth proportional to 75,275.38, 112,913.12 and 19,119.70 is: 28,679.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,275.38 : 112,913.12 = 19,119.70 : x
  2. Step 2: Convert to fraction form
    75,275.38/112,913.12 = 19,119.70/x
  3. Step 3: Cross multiply
    75,275.38x = 112,913.12 × 19,119.70
  4. Step 4: Simplify right side
    75,275.38x = 2,158,864,980.46
  5. Step 5: Solve for x
    x = 2,158,864,980.46/75,275.38
  6. Step 6: Final answer
    x = 28,679.56

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1.5x scale

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.