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Finding the Fourth Proportional to 72,148.60, 108,222.90 and 54,652.60

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Solution

The fourth proportional to 72,148.60, 108,222.90 and 54,652.60 is: 81,978.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,148.60 : 108,222.90 = 54,652.60 : x
  2. Step 2: Convert to fraction form
    72,148.60/108,222.90 = 54,652.60/x
  3. Step 3: Cross multiply
    72,148.60x = 108,222.90 × 54,652.60
  4. Step 4: Simplify right side
    72,148.60x = 5,914,662,864.54
  5. Step 5: Solve for x
    x = 5,914,662,864.54/72,148.60
  6. Step 6: Final answer
    x = 81,978.90

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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.