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Finding the Fourth Proportional to 107,807.70, 161,711.55 and 66,278.10

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Solution

The fourth proportional to 107,807.70, 161,711.55 and 66,278.10 is: 99,417.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,807.70 : 161,711.55 = 66,278.10 : x
  2. Step 2: Convert to fraction form
    107,807.70/161,711.55 = 66,278.10/x
  3. Step 3: Cross multiply
    107,807.70x = 161,711.55 × 66,278.10
  4. Step 4: Simplify right side
    107,807.70x = 10,717,934,282.06
  5. Step 5: Solve for x
    x = 10,717,934,282.06/107,807.70
  6. Step 6: Final answer
    x = 99,417.15

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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.