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Finding the Fourth Proportional to 215,140.95, 322,711.29 and 65,380.86

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Solution

The fourth proportional to 215,140.95, 322,711.29 and 65,380.86 is: 98,071.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,140.95 : 322,711.29 = 65,380.86 : x
  2. Step 2: Convert to fraction form
    215,140.95/322,711.29 = 65,380.86/x
  3. Step 3: Cross multiply
    215,140.95x = 322,711.29 × 65,380.86
  4. Step 4: Simplify right side
    215,140.95x = 21,099,141,671.91
  5. Step 5: Solve for x
    x = 21,099,141,671.91/215,140.95
  6. Step 6: Final answer
    x = 98,071.25

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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.