Home / 86,631.80-129,947.70-53,243.60

Finding the Fourth Proportional to 86,631.80, 129,947.70 and 53,243.60

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Solution

The fourth proportional to 86,631.80, 129,947.70 and 53,243.60 is: 79,865.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,631.80 : 129,947.70 = 53,243.60 : x
  2. Step 2: Convert to fraction form
    86,631.80/129,947.70 = 53,243.60/x
  3. Step 3: Cross multiply
    86,631.80x = 129,947.70 × 53,243.60
  4. Step 4: Simplify right side
    86,631.80x = 6,918,883,359.72
  5. Step 5: Solve for x
    x = 6,918,883,359.72/86,631.80
  6. Step 6: Final answer
    x = 79,865.40

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Similar ratio
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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.