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Finding the Fourth Proportional to 84,741.60, 127,112.40 and 80,148.90

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Solution

The fourth proportional to 84,741.60, 127,112.40 and 80,148.90 is: 120,223.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,741.60 : 127,112.40 = 80,148.90 : x
  2. Step 2: Convert to fraction form
    84,741.60/127,112.40 = 80,148.90/x
  3. Step 3: Cross multiply
    84,741.60x = 127,112.40 × 80,148.90
  4. Step 4: Simplify right side
    84,741.60x = 10,187,919,036.36
  5. Step 5: Solve for x
    x = 10,187,919,036.36/84,741.60
  6. Step 6: Final answer
    x = 120,223.35

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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.