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Finding the Fourth Proportional to 84,500.20, 126,750.30 and 31,911.40

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Solution

The fourth proportional to 84,500.20, 126,750.30 and 31,911.40 is: 47,867.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,500.20 : 126,750.30 = 31,911.40 : x
  2. Step 2: Convert to fraction form
    84,500.20/126,750.30 = 31,911.40/x
  3. Step 3: Cross multiply
    84,500.20x = 126,750.30 × 31,911.40
  4. Step 4: Simplify right side
    84,500.20x = 4,044,779,523.42
  5. Step 5: Solve for x
    x = 4,044,779,523.42/84,500.20
  6. Step 6: Final answer
    x = 47,867.10

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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.