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Finding the Fourth Proportional to 243,947.20, 365,920.80 and 86,180.80

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Solution

The fourth proportional to 243,947.20, 365,920.80 and 86,180.80 is: 129,271.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,947.20 : 365,920.80 = 86,180.80 : x
  2. Step 2: Convert to fraction form
    243,947.20/365,920.80 = 86,180.80/x
  3. Step 3: Cross multiply
    243,947.20x = 365,920.80 × 86,180.80
  4. Step 4: Simplify right side
    243,947.20x = 31,535,347,280.64
  5. Step 5: Solve for x
    x = 31,535,347,280.64/243,947.20
  6. Step 6: Final answer
    x = 129,271.20

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1.5x scale

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.