Home / 91,739.20-137,608.80-56,747.20

Finding the Fourth Proportional to 91,739.20, 137,608.80 and 56,747.20

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Solution

The fourth proportional to 91,739.20, 137,608.80 and 56,747.20 is: 85,120.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,739.20 : 137,608.80 = 56,747.20 : x
  2. Step 2: Convert to fraction form
    91,739.20/137,608.80 = 56,747.20/x
  3. Step 3: Cross multiply
    91,739.20x = 137,608.80 × 56,747.20
  4. Step 4: Simplify right side
    91,739.20x = 7,808,914,095.36
  5. Step 5: Solve for x
    x = 7,808,914,095.36/91,739.20
  6. Step 6: Final answer
    x = 85,120.80

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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.