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Finding the Fourth Proportional to 138,376.80, 207,127.80 and 99,010.80

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Solution

The fourth proportional to 138,376.80, 207,127.80 and 99,010.80 is: 148,203.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,376.80 : 207,127.80 = 99,010.80 : x
  2. Step 2: Convert to fraction form
    138,376.80/207,127.80 = 99,010.80/x
  3. Step 3: Cross multiply
    138,376.80x = 207,127.80 × 99,010.80
  4. Step 4: Simplify right side
    138,376.80x = 20,507,889,180.24
  5. Step 5: Solve for x
    x = 20,507,889,180.24/138,376.80
  6. Step 6: Final answer
    x = 148,203.23

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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.