Home / 138,938.40-191,683.20-91,218.24

Finding the Fourth Proportional to 138,938.40, 191,683.20 and 91,218.24

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Solution

The fourth proportional to 138,938.40, 191,683.20 and 91,218.24 is: 125,847.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,938.40 : 191,683.20 = 91,218.24 : x
  2. Step 2: Convert to fraction form
    138,938.40/191,683.20 = 91,218.24/x
  3. Step 3: Cross multiply
    138,938.40x = 191,683.20 × 91,218.24
  4. Step 4: Simplify right side
    138,938.40x = 17,485,004,141.57
  5. Step 5: Solve for x
    x = 17,485,004,141.57/138,938.40
  6. Step 6: Final answer
    x = 125,847.17

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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.