Home / 81,440.60-122,156.85-42,001.70

Finding the Fourth Proportional to 81,440.60, 122,156.85 and 42,001.70

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Solution

The fourth proportional to 81,440.60, 122,156.85 and 42,001.70 is: 63,000.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,440.60 : 122,156.85 = 42,001.70 : x
  2. Step 2: Convert to fraction form
    81,440.60/122,156.85 = 42,001.70/x
  3. Step 3: Cross multiply
    81,440.60x = 122,156.85 × 42,001.70
  4. Step 4: Simplify right side
    81,440.60x = 5,130,795,366.65
  5. Step 5: Solve for x
    x = 5,130,795,366.65/81,440.60
  6. Step 6: Final answer
    x = 63,000.46

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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.