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Finding the Fourth Proportional to 147,585.20, 221,377.80 and 85,182.80

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Solution

The fourth proportional to 147,585.20, 221,377.80 and 85,182.80 is: 127,774.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,585.20 : 221,377.80 = 85,182.80 : x
  2. Step 2: Convert to fraction form
    147,585.20/221,377.80 = 85,182.80/x
  3. Step 3: Cross multiply
    147,585.20x = 221,377.80 × 85,182.80
  4. Step 4: Simplify right side
    147,585.20x = 18,857,580,861.84
  5. Step 5: Solve for x
    x = 18,857,580,861.84/147,585.20
  6. Step 6: Final answer
    x = 127,774.20

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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.