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Finding the Fourth Proportional to 138,026.63, 207,088.55 and 67,955.15

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Solution

The fourth proportional to 138,026.63, 207,088.55 and 67,955.15 is: 101,956.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,026.63 : 207,088.55 = 67,955.15 : x
  2. Step 2: Convert to fraction form
    138,026.63/207,088.55 = 67,955.15/x
  3. Step 3: Cross multiply
    138,026.63x = 207,088.55 × 67,955.15
  4. Step 4: Simplify right side
    138,026.63x = 14,072,732,103.31
  5. Step 5: Solve for x
    x = 14,072,732,103.31/138,026.63
  6. Step 6: Final answer
    x = 101,956.65

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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.