Home / 81,064.80-121,532.40-34,279.20

Finding the Fourth Proportional to 81,064.80, 121,532.40 and 34,279.20

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Solution

The fourth proportional to 81,064.80, 121,532.40 and 34,279.20 is: 51,391.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,064.80 : 121,532.40 = 34,279.20 : x
  2. Step 2: Convert to fraction form
    81,064.80/121,532.40 = 34,279.20/x
  3. Step 3: Cross multiply
    81,064.80x = 121,532.40 × 34,279.20
  4. Step 4: Simplify right side
    81,064.80x = 4,166,033,446.08
  5. Step 5: Solve for x
    x = 4,166,033,446.08/81,064.80
  6. Step 6: Final answer
    x = 51,391.40

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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.