Home / 91,447.20-137,170.80-56,455.20

Finding the Fourth Proportional to 91,447.20, 137,170.80 and 56,455.20

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Solution

The fourth proportional to 91,447.20, 137,170.80 and 56,455.20 is: 84,682.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,447.20 : 137,170.80 = 56,455.20 : x
  2. Step 2: Convert to fraction form
    91,447.20/137,170.80 = 56,455.20/x
  3. Step 3: Cross multiply
    91,447.20x = 137,170.80 × 56,455.20
  4. Step 4: Simplify right side
    91,447.20x = 7,744,004,948.16
  5. Step 5: Solve for x
    x = 7,744,004,948.16/91,447.20
  6. Step 6: Final answer
    x = 84,682.80

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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.