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Finding the Fourth Proportional to 127,987.56, 176,622.30 and 71,398.98

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Solution

The fourth proportional to 127,987.56, 176,622.30 and 71,398.98 is: 98,530.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,987.56 : 176,622.30 = 71,398.98 : x
  2. Step 2: Convert to fraction form
    127,987.56/176,622.30 = 71,398.98/x
  3. Step 3: Cross multiply
    127,987.56x = 176,622.30 × 71,398.98
  4. Step 4: Simplify right side
    127,987.56x = 12,610,652,065.25
  5. Step 5: Solve for x
    x = 12,610,652,065.25/127,987.56
  6. Step 6: Final answer
    x = 98,530.30

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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.