Home / 78,742.46-118,079.07-28,809.61

Finding the Fourth Proportional to 78,742.46, 118,079.07 and 28,809.61

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Solution

The fourth proportional to 78,742.46, 118,079.07 and 28,809.61 is: 43,201.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,742.46 : 118,079.07 = 28,809.61 : x
  2. Step 2: Convert to fraction form
    78,742.46/118,079.07 = 28,809.61/x
  3. Step 3: Cross multiply
    78,742.46x = 118,079.07 × 28,809.61
  4. Step 4: Simplify right side
    78,742.46x = 3,401,811,552.63
  5. Step 5: Solve for x
    x = 3,401,811,552.63/78,742.46
  6. Step 6: Final answer
    x = 43,201.74

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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.