Home / 257,445.59-355,295.89-142,760.20

Finding the Fourth Proportional to 257,445.59, 355,295.89 and 142,760.20

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Solution

The fourth proportional to 257,445.59, 355,295.89 and 142,760.20 is: 197,020.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,445.59 : 355,295.89 = 142,760.20 : x
  2. Step 2: Convert to fraction form
    257,445.59/355,295.89 = 142,760.20/x
  3. Step 3: Cross multiply
    257,445.59x = 355,295.89 × 142,760.20
  4. Step 4: Simplify right side
    257,445.59x = 50,722,110,539.10
  5. Step 5: Solve for x
    x = 50,722,110,539.10/257,445.59
  6. Step 6: Final answer
    x = 197,020.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.