Home / 103,129.48-142,327.39-57,806.74

Finding the Fourth Proportional to 103,129.48, 142,327.39 and 57,806.74

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Solution

The fourth proportional to 103,129.48, 142,327.39 and 57,806.74 is: 79,778.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,129.48 : 142,327.39 = 57,806.74 : x
  2. Step 2: Convert to fraction form
    103,129.48/142,327.39 = 57,806.74/x
  3. Step 3: Cross multiply
    103,129.48x = 142,327.39 × 57,806.74
  4. Step 4: Simplify right side
    103,129.48x = 8,227,481,928.27
  5. Step 5: Solve for x
    x = 8,227,481,928.27/103,129.48
  6. Step 6: Final answer
    x = 79,778.18

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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.