Home / 99,728.57-137,611.80-57,287.10

Finding the Fourth Proportional to 99,728.57, 137,611.80 and 57,287.10

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Solution

The fourth proportional to 99,728.57, 137,611.80 and 57,287.10 is: 79,048.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,728.57 : 137,611.80 = 57,287.10 : x
  2. Step 2: Convert to fraction form
    99,728.57/137,611.80 = 57,287.10/x
  3. Step 3: Cross multiply
    99,728.57x = 137,611.80 × 57,287.10
  4. Step 4: Simplify right side
    99,728.57x = 7,883,380,947.78
  5. Step 5: Solve for x
    x = 7,883,380,947.78/99,728.57
  6. Step 6: Final answer
    x = 79,048.37

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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.