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Finding the Fourth Proportional to 312,040.80, 468,061.20 and 125,186.40

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Solution

The fourth proportional to 312,040.80, 468,061.20 and 125,186.40 is: 187,779.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,040.80 : 468,061.20 = 125,186.40 : x
  2. Step 2: Convert to fraction form
    312,040.80/468,061.20 = 125,186.40/x
  3. Step 3: Cross multiply
    312,040.80x = 468,061.20 × 125,186.40
  4. Step 4: Simplify right side
    312,040.80x = 58,594,896,607.68
  5. Step 5: Solve for x
    x = 58,594,896,607.68/312,040.80
  6. Step 6: Final answer
    x = 187,779.60

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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.