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Finding the Fourth Proportional to 138,362.40, 207,730.26 and 88,539.84

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Solution

The fourth proportional to 138,362.40, 207,730.26 and 88,539.84 is: 132,929.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,362.40 : 207,730.26 = 88,539.84 : x
  2. Step 2: Convert to fraction form
    138,362.40/207,730.26 = 88,539.84/x
  3. Step 3: Cross multiply
    138,362.40x = 207,730.26 × 88,539.84
  4. Step 4: Simplify right side
    138,362.40x = 18,392,403,983.56
  5. Step 5: Solve for x
    x = 18,392,403,983.56/138,362.40
  6. Step 6: Final answer
    x = 132,929.21

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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.