Home / 103,129.29-142,327.13-57,806.55

Finding the Fourth Proportional to 103,129.29, 142,327.13 and 57,806.55

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Solution

The fourth proportional to 103,129.29, 142,327.13 and 57,806.55 is: 79,777.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,129.29 : 142,327.13 = 57,806.55 : x
  2. Step 2: Convert to fraction form
    103,129.29/142,327.13 = 57,806.55/x
  3. Step 3: Cross multiply
    103,129.29x = 142,327.13 × 57,806.55
  4. Step 4: Simplify right side
    103,129.29x = 8,227,440,067.67
  5. Step 5: Solve for x
    x = 8,227,440,067.67/103,129.29
  6. Step 6: Final answer
    x = 79,777.92

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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.