Home / 72,555.12-108,790.65-28,129.86

Finding the Fourth Proportional to 72,555.12, 108,790.65 and 28,129.86

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Solution

The fourth proportional to 72,555.12, 108,790.65 and 28,129.86 is: 42,178.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,555.12 : 108,790.65 = 28,129.86 : x
  2. Step 2: Convert to fraction form
    72,555.12/108,790.65 = 28,129.86/x
  3. Step 3: Cross multiply
    72,555.12x = 108,790.65 × 28,129.86
  4. Step 4: Simplify right side
    72,555.12x = 3,060,265,753.81
  5. Step 5: Solve for x
    x = 3,060,265,753.81/72,555.12
  6. Step 6: Final answer
    x = 42,178.49

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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.