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Finding the Fourth Proportional to 80,862.40, 121,277.40 and 38,742.40

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Solution

The fourth proportional to 80,862.40, 121,277.40 and 38,742.40 is: 58,105.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,862.40 : 121,277.40 = 38,742.40 : x
  2. Step 2: Convert to fraction form
    80,862.40/121,277.40 = 38,742.40/x
  3. Step 3: Cross multiply
    80,862.40x = 121,277.40 × 38,742.40
  4. Step 4: Simplify right side
    80,862.40x = 4,698,577,541.76
  5. Step 5: Solve for x
    x = 4,698,577,541.76/80,862.40
  6. Step 6: Final answer
    x = 58,105.84

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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.