Home / 112,281.96-168,423.72-77,115

Finding the Fourth Proportional to 112,281.96, 168,423.72 and 77,115

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Solution

The fourth proportional to 112,281.96, 168,423.72 and 77,115 is: 115,673.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,281.96 : 168,423.72 = 77,115 : x
  2. Step 2: Convert to fraction form
    112,281.96/168,423.72 = 77,115/x
  3. Step 3: Cross multiply
    112,281.96x = 168,423.72 × 77,115
  4. Step 4: Simplify right side
    112,281.96x = 12,987,995,167.80
  5. Step 5: Solve for x
    x = 12,987,995,167.80/112,281.96
  6. Step 6: Final answer
    x = 115,673.04

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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.