Home / 78,370.15-117,504.11-28,440.79

Finding the Fourth Proportional to 78,370.15, 117,504.11 and 28,440.79

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Solution

The fourth proportional to 78,370.15, 117,504.11 and 28,440.79 is: 42,642.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,370.15 : 117,504.11 = 28,440.79 : x
  2. Step 2: Convert to fraction form
    78,370.15/117,504.11 = 28,440.79/x
  3. Step 3: Cross multiply
    78,370.15x = 117,504.11 × 28,440.79
  4. Step 4: Simplify right side
    78,370.15x = 3,341,909,574.44
  5. Step 5: Solve for x
    x = 3,341,909,574.44/78,370.15
  6. Step 6: Final answer
    x = 42,642.63

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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.