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Finding the Fourth Proportional to 107,543.80, 161,142.90 and 89,918.20

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Solution

The fourth proportional to 107,543.80, 161,142.90 and 89,918.20 is: 134,732.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,543.80 : 161,142.90 = 89,918.20 : x
  2. Step 2: Convert to fraction form
    107,543.80/161,142.90 = 89,918.20/x
  3. Step 3: Cross multiply
    107,543.80x = 161,142.90 × 89,918.20
  4. Step 4: Simplify right side
    107,543.80x = 14,489,679,510.78
  5. Step 5: Solve for x
    x = 14,489,679,510.78/107,543.80
  6. Step 6: Final answer
    x = 134,732.82

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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.