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Finding the Fourth Proportional to 248,000.20, 372,000.30 and 129,707.80

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Solution

The fourth proportional to 248,000.20, 372,000.30 and 129,707.80 is: 194,561.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,000.20 : 372,000.30 = 129,707.80 : x
  2. Step 2: Convert to fraction form
    248,000.20/372,000.30 = 129,707.80/x
  3. Step 3: Cross multiply
    248,000.20x = 372,000.30 × 129,707.80
  4. Step 4: Simplify right side
    248,000.20x = 48,251,340,512.34
  5. Step 5: Solve for x
    x = 48,251,340,512.34/248,000.20
  6. Step 6: Final answer
    x = 194,561.70

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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.