Home / 285,432.90-428,148.09-72,202.80

Finding the Fourth Proportional to 285,432.90, 428,148.09 and 72,202.80

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Solution

The fourth proportional to 285,432.90, 428,148.09 and 72,202.80 is: 108,303.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,432.90 : 428,148.09 = 72,202.80 : x
  2. Step 2: Convert to fraction form
    285,432.90/428,148.09 = 72,202.80/x
  3. Step 3: Cross multiply
    285,432.90x = 428,148.09 × 72,202.80
  4. Step 4: Simplify right side
    285,432.90x = 30,913,490,912.65
  5. Step 5: Solve for x
    x = 30,913,490,912.65/285,432.90
  6. Step 6: Final answer
    x = 108,303.88

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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.