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Finding the Fourth Proportional to 161,343.20, 242,014.80 and 91,359.20

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Solution

The fourth proportional to 161,343.20, 242,014.80 and 91,359.20 is: 137,038.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,343.20 : 242,014.80 = 91,359.20 : x
  2. Step 2: Convert to fraction form
    161,343.20/242,014.80 = 91,359.20/x
  3. Step 3: Cross multiply
    161,343.20x = 242,014.80 × 91,359.20
  4. Step 4: Simplify right side
    161,343.20x = 22,110,278,516.16
  5. Step 5: Solve for x
    x = 22,110,278,516.16/161,343.20
  6. Step 6: Final answer
    x = 137,038.80

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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.