Home / 78,180.57-107,888.76-42,370.20

Finding the Fourth Proportional to 78,180.57, 107,888.76 and 42,370.20

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Solution

The fourth proportional to 78,180.57, 107,888.76 and 42,370.20 is: 58,470.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,180.57 : 107,888.76 = 42,370.20 : x
  2. Step 2: Convert to fraction form
    78,180.57/107,888.76 = 42,370.20/x
  3. Step 3: Cross multiply
    78,180.57x = 107,888.76 × 42,370.20
  4. Step 4: Simplify right side
    78,180.57x = 4,571,268,338.95
  5. Step 5: Solve for x
    x = 4,571,268,338.95/78,180.57
  6. Step 6: Final answer
    x = 58,470.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.