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Finding the Fourth Proportional to 127,706.88, 176,276.16 and 87,405.60

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Solution

The fourth proportional to 127,706.88, 176,276.16 and 87,405.60 is: 120,647.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,706.88 : 176,276.16 = 87,405.60 : x
  2. Step 2: Convert to fraction form
    127,706.88/176,276.16 = 87,405.60/x
  3. Step 3: Cross multiply
    127,706.88x = 176,276.16 × 87,405.60
  4. Step 4: Simplify right side
    127,706.88x = 15,407,523,530.50
  5. Step 5: Solve for x
    x = 15,407,523,530.50/127,706.88
  6. Step 6: Final answer
    x = 120,647.56

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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.