Home / 265,799.12-398,630.76-78,766.88

Finding the Fourth Proportional to 265,799.12, 398,630.76 and 78,766.88

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Solution

The fourth proportional to 265,799.12, 398,630.76 and 78,766.88 is: 118,130.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,799.12 : 398,630.76 = 78,766.88 : x
  2. Step 2: Convert to fraction form
    265,799.12/398,630.76 = 78,766.88/x
  3. Step 3: Cross multiply
    265,799.12x = 398,630.76 × 78,766.88
  4. Step 4: Simplify right side
    265,799.12x = 31,398,901,237.23
  5. Step 5: Solve for x
    x = 31,398,901,237.23/265,799.12
  6. Step 6: Final answer
    x = 118,130.19

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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.