Home / 78,679.02-108,576.97-42,869.32

Finding the Fourth Proportional to 78,679.02, 108,576.97 and 42,869.32

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Solution

The fourth proportional to 78,679.02, 108,576.97 and 42,869.32 is: 59,159.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,679.02 : 108,576.97 = 42,869.32 : x
  2. Step 2: Convert to fraction form
    78,679.02/108,576.97 = 42,869.32/x
  3. Step 3: Cross multiply
    78,679.02x = 108,576.97 × 42,869.32
  4. Step 4: Simplify right side
    78,679.02x = 4,654,620,871.56
  5. Step 5: Solve for x
    x = 4,654,620,871.56/78,679.02
  6. Step 6: Final answer
    x = 59,159.62

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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.