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Finding the Fourth Proportional to 72,441.20, 108,661.80 and 52,612.40

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Solution

The fourth proportional to 72,441.20, 108,661.80 and 52,612.40 is: 78,918.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,441.20 : 108,661.80 = 52,612.40 : x
  2. Step 2: Convert to fraction form
    72,441.20/108,661.80 = 52,612.40/x
  3. Step 3: Cross multiply
    72,441.20x = 108,661.80 × 52,612.40
  4. Step 4: Simplify right side
    72,441.20x = 5,716,958,086.32
  5. Step 5: Solve for x
    x = 5,716,958,086.32/72,441.20
  6. Step 6: Final answer
    x = 78,918.60

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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.