Home / 257,621.60-386,432.40-70,632.80

Finding the Fourth Proportional to 257,621.60, 386,432.40 and 70,632.80

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Solution

The fourth proportional to 257,621.60, 386,432.40 and 70,632.80 is: 105,949.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,621.60 : 386,432.40 = 70,632.80 : x
  2. Step 2: Convert to fraction form
    257,621.60/386,432.40 = 70,632.80/x
  3. Step 3: Cross multiply
    257,621.60x = 386,432.40 × 70,632.80
  4. Step 4: Simplify right side
    257,621.60x = 27,294,802,422.72
  5. Step 5: Solve for x
    x = 27,294,802,422.72/257,621.60
  6. Step 6: Final answer
    x = 105,949.20

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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.