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Finding the Fourth Proportional to 72,001.80, 107,856.90 and 49,840.20

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Solution

The fourth proportional to 72,001.80, 107,856.90 and 49,840.20 is: 74,659.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,001.80 : 107,856.90 = 49,840.20 : x
  2. Step 2: Convert to fraction form
    72,001.80/107,856.90 = 49,840.20/x
  3. Step 3: Cross multiply
    72,001.80x = 107,856.90 × 49,840.20
  4. Step 4: Simplify right side
    72,001.80x = 5,375,609,467.38
  5. Step 5: Solve for x
    x = 5,375,609,467.38/72,001.80
  6. Step 6: Final answer
    x = 74,659.38

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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.