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Finding the Fourth Proportional to 117,124.98, 175,728.17 and 85,134.03

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Solution

The fourth proportional to 117,124.98, 175,728.17 and 85,134.03 is: 127,730.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,124.98 : 175,728.17 = 85,134.03 : x
  2. Step 2: Convert to fraction form
    117,124.98/175,728.17 = 85,134.03/x
  3. Step 3: Cross multiply
    117,124.98x = 175,728.17 × 85,134.03
  4. Step 4: Simplify right side
    117,124.98x = 14,960,447,296.63
  5. Step 5: Solve for x
    x = 14,960,447,296.63/117,124.98
  6. Step 6: Final answer
    x = 127,730.63

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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.