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Finding the Fourth Proportional to 138,552.40, 207,309.62 and 98,663.58

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Solution

The fourth proportional to 138,552.40, 207,309.62 and 98,663.58 is: 147,625.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,552.40 : 207,309.62 = 98,663.58 : x
  2. Step 2: Convert to fraction form
    138,552.40/207,309.62 = 98,663.58/x
  3. Step 3: Cross multiply
    138,552.40x = 207,309.62 × 98,663.58
  4. Step 4: Simplify right side
    138,552.40x = 20,453,909,277.64
  5. Step 5: Solve for x
    x = 20,453,909,277.64/138,552.40
  6. Step 6: Final answer
    x = 147,625.80

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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.