Home / 83,785.23-115,620.44-47,978.60

Finding the Fourth Proportional to 83,785.23, 115,620.44 and 47,978.60

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Solution

The fourth proportional to 83,785.23, 115,620.44 and 47,978.60 is: 66,208.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,785.23 : 115,620.44 = 47,978.60 : x
  2. Step 2: Convert to fraction form
    83,785.23/115,620.44 = 47,978.60/x
  3. Step 3: Cross multiply
    83,785.23x = 115,620.44 × 47,978.60
  4. Step 4: Simplify right side
    83,785.23x = 5,547,306,024.59
  5. Step 5: Solve for x
    x = 5,547,306,024.59/83,785.23
  6. Step 6: Final answer
    x = 66,208.64

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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.