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Finding the Fourth Proportional to 80,887.30, 121,330.95 and 28,291.30

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Solution

The fourth proportional to 80,887.30, 121,330.95 and 28,291.30 is: 42,436.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,887.30 : 121,330.95 = 28,291.30 : x
  2. Step 2: Convert to fraction form
    80,887.30/121,330.95 = 28,291.30/x
  3. Step 3: Cross multiply
    80,887.30x = 121,330.95 × 28,291.30
  4. Step 4: Simplify right side
    80,887.30x = 3,432,610,305.74
  5. Step 5: Solve for x
    x = 3,432,610,305.74/80,887.30
  6. Step 6: Final answer
    x = 42,436.95

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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.