Home / 84,757.92-127,139.50-42,639.72

Finding the Fourth Proportional to 84,757.92, 127,139.50 and 42,639.72

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Solution

The fourth proportional to 84,757.92, 127,139.50 and 42,639.72 is: 63,960.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,757.92 : 127,139.50 = 42,639.72 : x
  2. Step 2: Convert to fraction form
    84,757.92/127,139.50 = 42,639.72/x
  3. Step 3: Cross multiply
    84,757.92x = 127,139.50 × 42,639.72
  4. Step 4: Simplify right side
    84,757.92x = 5,421,192,137.54
  5. Step 5: Solve for x
    x = 5,421,192,137.54/84,757.92
  6. Step 6: Final answer
    x = 63,960.89

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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.