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Finding the Fourth Proportional to 127,689.54, 176,211.90 and 70,327.50

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Solution

The fourth proportional to 127,689.54, 176,211.90 and 70,327.50 is: 97,052.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,689.54 : 176,211.90 = 70,327.50 : x
  2. Step 2: Convert to fraction form
    127,689.54/176,211.90 = 70,327.50/x
  3. Step 3: Cross multiply
    127,689.54x = 176,211.90 × 70,327.50
  4. Step 4: Simplify right side
    127,689.54x = 12,392,542,397.25
  5. Step 5: Solve for x
    x = 12,392,542,397.25/127,689.54
  6. Step 6: Final answer
    x = 97,052.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.