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Finding the Fourth Proportional to 72,420.50, 108,632.10 and 22,500.20

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Solution

The fourth proportional to 72,420.50, 108,632.10 and 22,500.20 is: 33,750.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,420.50 : 108,632.10 = 22,500.20 : x
  2. Step 2: Convert to fraction form
    72,420.50/108,632.10 = 22,500.20/x
  3. Step 3: Cross multiply
    72,420.50x = 108,632.10 × 22,500.20
  4. Step 4: Simplify right side
    72,420.50x = 2,444,243,976.42
  5. Step 5: Solve for x
    x = 2,444,243,976.42/72,420.50
  6. Step 6: Final answer
    x = 33,750.72

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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.