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Finding the Fourth Proportional to 138,032.70, 207,051.03 and 90,949.29

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Solution

The fourth proportional to 138,032.70, 207,051.03 and 90,949.29 is: 136,425.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,032.70 : 207,051.03 = 90,949.29 : x
  2. Step 2: Convert to fraction form
    138,032.70/207,051.03 = 90,949.29/x
  3. Step 3: Cross multiply
    138,032.70x = 207,051.03 × 90,949.29
  4. Step 4: Simplify right side
    138,032.70x = 18,831,144,172.27
  5. Step 5: Solve for x
    x = 18,831,144,172.27/138,032.70
  6. Step 6: Final answer
    x = 136,425.24

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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.