Home / 138,114.28-190,614.60-77,687.46

Finding the Fourth Proportional to 138,114.28, 190,614.60 and 77,687.46

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Solution

The fourth proportional to 138,114.28, 190,614.60 and 77,687.46 is: 107,218.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,114.28 : 190,614.60 = 77,687.46 : x
  2. Step 2: Convert to fraction form
    138,114.28/190,614.60 = 77,687.46/x
  3. Step 3: Cross multiply
    138,114.28x = 190,614.60 × 77,687.46
  4. Step 4: Simplify right side
    138,114.28x = 14,808,364,112.92
  5. Step 5: Solve for x
    x = 14,808,364,112.92/138,114.28
  6. Step 6: Final answer
    x = 107,218.20

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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.