Home / 91,964.40-137,764.35-81,005.10

Finding the Fourth Proportional to 91,964.40, 137,764.35 and 81,005.10

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Solution

The fourth proportional to 91,964.40, 137,764.35 and 81,005.10 is: 121,347.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,964.40 : 137,764.35 = 81,005.10 : x
  2. Step 2: Convert to fraction form
    91,964.40/137,764.35 = 81,005.10/x
  3. Step 3: Cross multiply
    91,964.40x = 137,764.35 × 81,005.10
  4. Step 4: Simplify right side
    91,964.40x = 11,159,614,948.19
  5. Step 5: Solve for x
    x = 11,159,614,948.19/91,964.40
  6. Step 6: Final answer
    x = 121,347.12

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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.