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Finding the Fourth Proportional to 84,337.40, 126,621.30 and 42,813.56

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Solution

The fourth proportional to 84,337.40, 126,621.30 and 42,813.56 is: 64,278.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,337.40 : 126,621.30 = 42,813.56 : x
  2. Step 2: Convert to fraction form
    84,337.40/126,621.30 = 42,813.56/x
  3. Step 3: Cross multiply
    84,337.40x = 126,621.30 × 42,813.56
  4. Step 4: Simplify right side
    84,337.40x = 5,421,108,624.83
  5. Step 5: Solve for x
    x = 5,421,108,624.83/84,337.40
  6. Step 6: Final answer
    x = 64,278.82

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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.