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Finding the Fourth Proportional to 104,195.65, 156,127.40 and 66,724.90

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Solution

The fourth proportional to 104,195.65, 156,127.40 and 66,724.90 is: 99,980.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,195.65 : 156,127.40 = 66,724.90 : x
  2. Step 2: Convert to fraction form
    104,195.65/156,127.40 = 66,724.90/x
  3. Step 3: Cross multiply
    104,195.65x = 156,127.40 × 66,724.90
  4. Step 4: Simplify right side
    104,195.65x = 10,417,584,428.32
  5. Step 5: Solve for x
    x = 10,417,584,428.32/104,195.65
  6. Step 6: Final answer
    x = 99,980.99

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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.