Home / 86,085.76-129,142-43,943.02

Finding the Fourth Proportional to 86,085.76, 129,142 and 43,943.02

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Solution

The fourth proportional to 86,085.76, 129,142 and 43,943.02 is: 65,921.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,085.76 : 129,142 = 43,943.02 : x
  2. Step 2: Convert to fraction form
    86,085.76/129,142 = 43,943.02/x
  3. Step 3: Cross multiply
    86,085.76x = 129,142 × 43,943.02
  4. Step 4: Simplify right side
    86,085.76x = 5,674,889,488.84
  5. Step 5: Solve for x
    x = 5,674,889,488.84/86,085.76
  6. Step 6: Final answer
    x = 65,921.35

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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.