Home / 78,719.28-118,104.84-31,959.60

Finding the Fourth Proportional to 78,719.28, 118,104.84 and 31,959.60

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Solution

The fourth proportional to 78,719.28, 118,104.84 and 31,959.60 is: 47,949.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,719.28 : 118,104.84 = 31,959.60 : x
  2. Step 2: Convert to fraction form
    78,719.28/118,104.84 = 31,959.60/x
  3. Step 3: Cross multiply
    78,719.28x = 118,104.84 × 31,959.60
  4. Step 4: Simplify right side
    78,719.28x = 3,774,583,444.46
  5. Step 5: Solve for x
    x = 3,774,583,444.46/78,719.28
  6. Step 6: Final answer
    x = 47,949.92

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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.