Home / 80,729.32-121,124.74-36,345.86

Finding the Fourth Proportional to 80,729.32, 121,124.74 and 36,345.86

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Solution

The fourth proportional to 80,729.32, 121,124.74 and 36,345.86 is: 54,532.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,729.32 : 121,124.74 = 36,345.86 : x
  2. Step 2: Convert to fraction form
    80,729.32/121,124.74 = 36,345.86/x
  3. Step 3: Cross multiply
    80,729.32x = 121,124.74 × 36,345.86
  4. Step 4: Simplify right side
    80,729.32x = 4,402,382,842.58
  5. Step 5: Solve for x
    x = 4,402,382,842.58/80,729.32
  6. Step 6: Final answer
    x = 54,532.64

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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.