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Finding the Fourth Proportional to 84,686.75, 127,079.32 and 37,939.62

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Solution

The fourth proportional to 84,686.75, 127,079.32 and 37,939.62 is: 56,931.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,686.75 : 127,079.32 = 37,939.62 : x
  2. Step 2: Convert to fraction form
    84,686.75/127,079.32 = 37,939.62/x
  3. Step 3: Cross multiply
    84,686.75x = 127,079.32 × 37,939.62
  4. Step 4: Simplify right side
    84,686.75x = 4,821,341,110.66
  5. Step 5: Solve for x
    x = 4,821,341,110.66/84,686.75
  6. Step 6: Final answer
    x = 56,931.47

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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.