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Finding the Fourth Proportional to 145,872.55, 218,789.38 and 40,682.71

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Solution

The fourth proportional to 145,872.55, 218,789.38 and 40,682.71 is: 61,018.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,872.55 : 218,789.38 = 40,682.71 : x
  2. Step 2: Convert to fraction form
    145,872.55/218,789.38 = 40,682.71/x
  3. Step 3: Cross multiply
    145,872.55x = 218,789.38 × 40,682.71
  4. Step 4: Simplify right side
    145,872.55x = 8,900,944,897.62
  5. Step 5: Solve for x
    x = 8,900,944,897.62/145,872.55
  6. Step 6: Final answer
    x = 61,018.64

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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.