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Finding the Fourth Proportional to 119,760.40, 179,640.60 and 75,437.20

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Solution

The fourth proportional to 119,760.40, 179,640.60 and 75,437.20 is: 113,155.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,760.40 : 179,640.60 = 75,437.20 : x
  2. Step 2: Convert to fraction form
    119,760.40/179,640.60 = 75,437.20/x
  3. Step 3: Cross multiply
    119,760.40x = 179,640.60 × 75,437.20
  4. Step 4: Simplify right side
    119,760.40x = 13,551,583,870.32
  5. Step 5: Solve for x
    x = 13,551,583,870.32/119,760.40
  6. Step 6: Final answer
    x = 113,155.80

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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.