Home / 99,728.18-137,624.88-57,286.70

Finding the Fourth Proportional to 99,728.18, 137,624.88 and 57,286.70

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Solution

The fourth proportional to 99,728.18, 137,624.88 and 57,286.70 is: 79,055.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,728.18 : 137,624.88 = 57,286.70 : x
  2. Step 2: Convert to fraction form
    99,728.18/137,624.88 = 57,286.70/x
  3. Step 3: Cross multiply
    99,728.18x = 137,624.88 × 57,286.70
  4. Step 4: Simplify right side
    99,728.18x = 7,884,075,213.10
  5. Step 5: Solve for x
    x = 7,884,075,213.10/99,728.18
  6. Step 6: Final answer
    x = 79,055.64

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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.