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Finding the Fourth Proportional to 138,401.52, 207,602.40 and 99,035.52

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Solution

The fourth proportional to 138,401.52, 207,602.40 and 99,035.52 is: 148,553.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,401.52 : 207,602.40 = 99,035.52 : x
  2. Step 2: Convert to fraction form
    138,401.52/207,602.40 = 99,035.52/x
  3. Step 3: Cross multiply
    138,401.52x = 207,602.40 × 99,035.52
  4. Step 4: Simplify right side
    138,401.52x = 20,560,011,637.25
  5. Step 5: Solve for x
    x = 20,560,011,637.25/138,401.52
  6. Step 6: Final answer
    x = 148,553.37

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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.