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Finding the Fourth Proportional to 261,340.60, 392,140.50 and 103,565.56

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Solution

The fourth proportional to 261,340.60, 392,140.50 and 103,565.56 is: 155,399.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,340.60 : 392,140.50 = 103,565.56 : x
  2. Step 2: Convert to fraction form
    261,340.60/392,140.50 = 103,565.56/x
  3. Step 3: Cross multiply
    261,340.60x = 392,140.50 × 103,565.56
  4. Step 4: Simplify right side
    261,340.60x = 40,612,250,481.18
  5. Step 5: Solve for x
    x = 40,612,250,481.18/261,340.60
  6. Step 6: Final answer
    x = 155,399.70

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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.