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Finding the Fourth Proportional to 127,139.55, 175,476.78 and 84,119.90

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Solution

The fourth proportional to 127,139.55, 175,476.78 and 84,119.90 is: 116,101.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,139.55 : 175,476.78 = 84,119.90 : x
  2. Step 2: Convert to fraction form
    127,139.55/175,476.78 = 84,119.90/x
  3. Step 3: Cross multiply
    127,139.55x = 175,476.78 × 84,119.90
  4. Step 4: Simplify right side
    127,139.55x = 14,761,088,308.54
  5. Step 5: Solve for x
    x = 14,761,088,308.54/127,139.55
  6. Step 6: Final answer
    x = 116,101.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.