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Finding the Fourth Proportional to 86,275.44, 129,321 and 61,576.56

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Solution

The fourth proportional to 86,275.44, 129,321 and 61,576.56 is: 92,299.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,275.44 : 129,321 = 61,576.56 : x
  2. Step 2: Convert to fraction form
    86,275.44/129,321 = 61,576.56/x
  3. Step 3: Cross multiply
    86,275.44x = 129,321 × 61,576.56
  4. Step 4: Simplify right side
    86,275.44x = 7,963,142,315.76
  5. Step 5: Solve for x
    x = 7,963,142,315.76/86,275.44
  6. Step 6: Final answer
    x = 92,299.06

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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.