Home / 85,849.72-128,780.75-22,669.21

Finding the Fourth Proportional to 85,849.72, 128,780.75 and 22,669.21

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Solution

The fourth proportional to 85,849.72, 128,780.75 and 22,669.21 is: 34,005.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,849.72 : 128,780.75 = 22,669.21 : x
  2. Step 2: Convert to fraction form
    85,849.72/128,780.75 = 22,669.21/x
  3. Step 3: Cross multiply
    85,849.72x = 128,780.75 × 22,669.21
  4. Step 4: Simplify right side
    85,849.72x = 2,919,357,865.71
  5. Step 5: Solve for x
    x = 2,919,357,865.71/85,849.72
  6. Step 6: Final answer
    x = 34,005.44

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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.