Home / 115,638.64-173,374.08-78,105.76

Finding the Fourth Proportional to 115,638.64, 173,374.08 and 78,105.76

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Solution

The fourth proportional to 115,638.64, 173,374.08 and 78,105.76 is: 117,101.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,638.64 : 173,374.08 = 78,105.76 : x
  2. Step 2: Convert to fraction form
    115,638.64/173,374.08 = 78,105.76/x
  3. Step 3: Cross multiply
    115,638.64x = 173,374.08 × 78,105.76
  4. Step 4: Simplify right side
    115,638.64x = 13,541,514,282.70
  5. Step 5: Solve for x
    x = 13,541,514,282.70/115,638.64
  6. Step 6: Final answer
    x = 117,101.98

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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.