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Finding the Fourth Proportional to 127,870.62, 176,461.68 and 71,280.78

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Solution

The fourth proportional to 127,870.62, 176,461.68 and 71,280.78 is: 98,367.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,870.62 : 176,461.68 = 71,280.78 : x
  2. Step 2: Convert to fraction form
    127,870.62/176,461.68 = 71,280.78/x
  3. Step 3: Cross multiply
    127,870.62x = 176,461.68 × 71,280.78
  4. Step 4: Simplify right side
    127,870.62x = 12,578,326,190.51
  5. Step 5: Solve for x
    x = 12,578,326,190.51/127,870.62
  6. Step 6: Final answer
    x = 98,367.60

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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.