Home / 91,785.80-137,570.70-52,380.20

Finding the Fourth Proportional to 91,785.80, 137,570.70 and 52,380.20

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Solution

The fourth proportional to 91,785.80, 137,570.70 and 52,380.20 is: 78,508.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,785.80 : 137,570.70 = 52,380.20 : x
  2. Step 2: Convert to fraction form
    91,785.80/137,570.70 = 52,380.20/x
  3. Step 3: Cross multiply
    91,785.80x = 137,570.70 × 52,380.20
  4. Step 4: Simplify right side
    91,785.80x = 7,205,980,780.14
  5. Step 5: Solve for x
    x = 7,205,980,780.14/91,785.80
  6. Step 6: Final answer
    x = 78,508.67

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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.