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Finding the Fourth Proportional to 84,765.60, 127,180.80 and 83,437.20

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Solution

The fourth proportional to 84,765.60, 127,180.80 and 83,437.20 is: 125,187.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,765.60 : 127,180.80 = 83,437.20 : x
  2. Step 2: Convert to fraction form
    84,765.60/127,180.80 = 83,437.20/x
  3. Step 3: Cross multiply
    84,765.60x = 127,180.80 × 83,437.20
  4. Step 4: Simplify right side
    84,765.60x = 10,611,609,845.76
  5. Step 5: Solve for x
    x = 10,611,609,845.76/84,765.60
  6. Step 6: Final answer
    x = 125,187.69

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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.