Home / 107,120.63-147,711.35-90,310.11

Finding the Fourth Proportional to 107,120.63, 147,711.35 and 90,310.11

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Solution

The fourth proportional to 107,120.63, 147,711.35 and 90,310.11 is: 124,530.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,120.63 : 147,711.35 = 90,310.11 : x
  2. Step 2: Convert to fraction form
    107,120.63/147,711.35 = 90,310.11/x
  3. Step 3: Cross multiply
    107,120.63x = 147,711.35 × 90,310.11
  4. Step 4: Simplify right side
    107,120.63x = 13,339,828,676.93
  5. Step 5: Solve for x
    x = 13,339,828,676.93/107,120.63
  6. Step 6: Final answer
    x = 124,530.91

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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.