Home / 78,654.30-117,387.21-73,321.42

Finding the Fourth Proportional to 78,654.30, 117,387.21 and 73,321.42

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Solution

The fourth proportional to 78,654.30, 117,387.21 and 73,321.42 is: 109,428.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,654.30 : 117,387.21 = 73,321.42 : x
  2. Step 2: Convert to fraction form
    78,654.30/117,387.21 = 73,321.42/x
  3. Step 3: Cross multiply
    78,654.30x = 117,387.21 × 73,321.42
  4. Step 4: Simplify right side
    78,654.30x = 8,606,996,927.04
  5. Step 5: Solve for x
    x = 8,606,996,927.04/78,654.30
  6. Step 6: Final answer
    x = 109,428.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.