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Finding the Fourth Proportional to 112,959.80, 169,439.70 and 28,719.80

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Solution

The fourth proportional to 112,959.80, 169,439.70 and 28,719.80 is: 43,079.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,959.80 : 169,439.70 = 28,719.80 : x
  2. Step 2: Convert to fraction form
    112,959.80/169,439.70 = 28,719.80/x
  3. Step 3: Cross multiply
    112,959.80x = 169,439.70 × 28,719.80
  4. Step 4: Simplify right side
    112,959.80x = 4,866,274,296.06
  5. Step 5: Solve for x
    x = 4,866,274,296.06/112,959.80
  6. Step 6: Final answer
    x = 43,079.70

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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.