Home / 130,621.28-195,987.40-71,387.76

Finding the Fourth Proportional to 130,621.28, 195,987.40 and 71,387.76

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Solution

The fourth proportional to 130,621.28, 195,987.40 and 71,387.76 is: 107,111.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,621.28 : 195,987.40 = 71,387.76 : x
  2. Step 2: Convert to fraction form
    130,621.28/195,987.40 = 71,387.76/x
  3. Step 3: Cross multiply
    130,621.28x = 195,987.40 × 71,387.76
  4. Step 4: Simplify right side
    130,621.28x = 13,991,100,678.23
  5. Step 5: Solve for x
    x = 13,991,100,678.23/130,621.28
  6. Step 6: Final answer
    x = 107,111.95

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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.