Home / 85,317.90-127,792.16-55,645.72

Finding the Fourth Proportional to 85,317.90, 127,792.16 and 55,645.72

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Solution

The fourth proportional to 85,317.90, 127,792.16 and 55,645.72 is: 83,348.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,317.90 : 127,792.16 = 55,645.72 : x
  2. Step 2: Convert to fraction form
    85,317.90/127,792.16 = 55,645.72/x
  3. Step 3: Cross multiply
    85,317.90x = 127,792.16 × 55,645.72
  4. Step 4: Simplify right side
    85,317.90x = 7,111,086,753.56
  5. Step 5: Solve for x
    x = 7,111,086,753.56/85,317.90
  6. Step 6: Final answer
    x = 83,348.12

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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.