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Finding the Fourth Proportional to 266,411.90, 399,608.61 and 66,734.00

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Solution

The fourth proportional to 266,411.90, 399,608.61 and 66,734.00 is: 100,098.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,411.90 : 399,608.61 = 66,734.00 : x
  2. Step 2: Convert to fraction form
    266,411.90/399,608.61 = 66,734.00/x
  3. Step 3: Cross multiply
    266,411.90x = 399,608.61 × 66,734.00
  4. Step 4: Simplify right side
    266,411.90x = 26,667,478,981.70
  5. Step 5: Solve for x
    x = 26,667,478,981.70/266,411.90
  6. Step 6: Final answer
    x = 100,098.68

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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.