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Finding the Fourth Proportional to 84,686.99, 127,079.70 and 37,939.87

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Solution

The fourth proportional to 84,686.99, 127,079.70 and 37,939.87 is: 56,931.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,686.99 : 127,079.70 = 37,939.87 : x
  2. Step 2: Convert to fraction form
    84,686.99/127,079.70 = 37,939.87/x
  3. Step 3: Cross multiply
    84,686.99x = 127,079.70 × 37,939.87
  4. Step 4: Simplify right side
    84,686.99x = 4,821,386,979.94
  5. Step 5: Solve for x
    x = 4,821,386,979.94/84,686.99
  6. Step 6: Final answer
    x = 56,931.85

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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.