Home / 81,440.50-122,130.72-28,118.86

Finding the Fourth Proportional to 81,440.50, 122,130.72 and 28,118.86

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Solution

The fourth proportional to 81,440.50, 122,130.72 and 28,118.86 is: 42,167.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,440.50 : 122,130.72 = 28,118.86 : x
  2. Step 2: Convert to fraction form
    81,440.50/122,130.72 = 28,118.86/x
  3. Step 3: Cross multiply
    81,440.50x = 122,130.72 × 28,118.86
  4. Step 4: Simplify right side
    81,440.50x = 3,434,176,617.38
  5. Step 5: Solve for x
    x = 3,434,176,617.38/81,440.50
  6. Step 6: Final answer
    x = 42,167.92

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1.5x scale

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.