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Finding the Fourth Proportional to 72,297.60, 108,235.20 and 51,561.60

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Solution

The fourth proportional to 72,297.60, 108,235.20 and 51,561.60 is: 77,191.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,297.60 : 108,235.20 = 51,561.60 : x
  2. Step 2: Convert to fraction form
    72,297.60/108,235.20 = 51,561.60/x
  3. Step 3: Cross multiply
    72,297.60x = 108,235.20 × 51,561.60
  4. Step 4: Simplify right side
    72,297.60x = 5,580,780,088.32
  5. Step 5: Solve for x
    x = 5,580,780,088.32/72,297.60
  6. Step 6: Final answer
    x = 77,191.78

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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.