Home / 91,785.81-126,428.40-64,882.05

Finding the Fourth Proportional to 91,785.81, 126,428.40 and 64,882.05

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Solution

The fourth proportional to 91,785.81, 126,428.40 and 64,882.05 is: 89,370.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,785.81 : 126,428.40 = 64,882.05 : x
  2. Step 2: Convert to fraction form
    91,785.81/126,428.40 = 64,882.05/x
  3. Step 3: Cross multiply
    91,785.81x = 126,428.40 × 64,882.05
  4. Step 4: Simplify right side
    91,785.81x = 8,202,933,770.22
  5. Step 5: Solve for x
    x = 8,202,933,770.22/91,785.81
  6. Step 6: Final answer
    x = 89,370.39

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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.