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Finding the Fourth Proportional to 144,569.52, 216,919.80 and 85,520.52

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Solution

The fourth proportional to 144,569.52, 216,919.80 and 85,520.52 is: 128,319.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,569.52 : 216,919.80 = 85,520.52 : x
  2. Step 2: Convert to fraction form
    144,569.52/216,919.80 = 85,520.52/x
  3. Step 3: Cross multiply
    144,569.52x = 216,919.80 × 85,520.52
  4. Step 4: Simplify right side
    144,569.52x = 18,551,094,094.30
  5. Step 5: Solve for x
    x = 18,551,094,094.30/144,569.52
  6. Step 6: Final answer
    x = 128,319.54

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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.