Home / 83,485.20-115,215.80-51,672.60

Finding the Fourth Proportional to 83,485.20, 115,215.80 and 51,672.60

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Solution

The fourth proportional to 83,485.20, 115,215.80 and 51,672.60 is: 71,312.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,485.20 : 115,215.80 = 51,672.60 : x
  2. Step 2: Convert to fraction form
    83,485.20/115,215.80 = 51,672.60/x
  3. Step 3: Cross multiply
    83,485.20x = 115,215.80 × 51,672.60
  4. Step 4: Simplify right side
    83,485.20x = 5,953,499,947.08
  5. Step 5: Solve for x
    x = 5,953,499,947.08/83,485.20
  6. Step 6: Final answer
    x = 71,312.04

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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.