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Finding the Fourth Proportional to 144,886.80, 217,330.20 and 115,143.60

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Solution

The fourth proportional to 144,886.80, 217,330.20 and 115,143.60 is: 172,715.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,886.80 : 217,330.20 = 115,143.60 : x
  2. Step 2: Convert to fraction form
    144,886.80/217,330.20 = 115,143.60/x
  3. Step 3: Cross multiply
    144,886.80x = 217,330.20 × 115,143.60
  4. Step 4: Simplify right side
    144,886.80x = 25,024,181,616.72
  5. Step 5: Solve for x
    x = 25,024,181,616.72/144,886.80
  6. Step 6: Final answer
    x = 172,715.40

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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.