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Finding the Fourth Proportional to 145,057.76, 217,411.68 and 74,898.80

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Solution

The fourth proportional to 145,057.76, 217,411.68 and 74,898.80 is: 112,257.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,057.76 : 217,411.68 = 74,898.80 : x
  2. Step 2: Convert to fraction form
    145,057.76/217,411.68 = 74,898.80/x
  3. Step 3: Cross multiply
    145,057.76x = 217,411.68 × 74,898.80
  4. Step 4: Simplify right side
    145,057.76x = 16,283,873,937.98
  5. Step 5: Solve for x
    x = 16,283,873,937.98/145,057.76
  6. Step 6: Final answer
    x = 112,257.86

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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.