Home / 99,855.60-137,823.84-57,438.72

Finding the Fourth Proportional to 99,855.60, 137,823.84 and 57,438.72

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Solution

The fourth proportional to 99,855.60, 137,823.84 and 57,438.72 is: 79,278.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,855.60 : 137,823.84 = 57,438.72 : x
  2. Step 2: Convert to fraction form
    99,855.60/137,823.84 = 57,438.72/x
  3. Step 3: Cross multiply
    99,855.60x = 137,823.84 × 57,438.72
  4. Step 4: Simplify right side
    99,855.60x = 7,916,424,955.08
  5. Step 5: Solve for x
    x = 7,916,424,955.08/99,855.60
  6. Step 6: Final answer
    x = 79,278.73

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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.