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Finding the Fourth Proportional to 145,385.20, 217,948.56 and 56,618.20

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Solution

The fourth proportional to 145,385.20, 217,948.56 and 56,618.20 is: 84,876.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,385.20 : 217,948.56 = 56,618.20 : x
  2. Step 2: Convert to fraction form
    145,385.20/217,948.56 = 56,618.20/x
  3. Step 3: Cross multiply
    145,385.20x = 217,948.56 × 56,618.20
  4. Step 4: Simplify right side
    145,385.20x = 12,339,855,159.79
  5. Step 5: Solve for x
    x = 12,339,855,159.79/145,385.20
  6. Step 6: Final answer
    x = 84,876.97

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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.