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Finding the Fourth Proportional to 138,079, 207,121.02 and 43,307.07

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Solution

The fourth proportional to 138,079, 207,121.02 and 43,307.07 is: 64,961.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,079 : 207,121.02 = 43,307.07 : x
  2. Step 2: Convert to fraction form
    138,079/207,121.02 = 43,307.07/x
  3. Step 3: Cross multiply
    138,079x = 207,121.02 × 43,307.07
  4. Step 4: Simplify right side
    138,079x = 8,969,804,511.61
  5. Step 5: Solve for x
    x = 8,969,804,511.61/138,079
  6. Step 6: Final answer
    x = 64,961.40

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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.