Home / 155,865.28-215,165.70-91,325.56

Finding the Fourth Proportional to 155,865.28, 215,165.70 and 91,325.56

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Solution

The fourth proportional to 155,865.28, 215,165.70 and 91,325.56 is: 126,071.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,865.28 : 215,165.70 = 91,325.56 : x
  2. Step 2: Convert to fraction form
    155,865.28/215,165.70 = 91,325.56/x
  3. Step 3: Cross multiply
    155,865.28x = 215,165.70 × 91,325.56
  4. Step 4: Simplify right side
    155,865.28x = 19,650,128,045.29
  5. Step 5: Solve for x
    x = 19,650,128,045.29/155,865.28
  6. Step 6: Final answer
    x = 126,071.23

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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.