Home / 103,007.86-142,139.10-57,679.54

Finding the Fourth Proportional to 103,007.86, 142,139.10 and 57,679.54

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Solution

The fourth proportional to 103,007.86, 142,139.10 and 57,679.54 is: 79,591.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,007.86 : 142,139.10 = 57,679.54 : x
  2. Step 2: Convert to fraction form
    103,007.86/142,139.10 = 57,679.54/x
  3. Step 3: Cross multiply
    103,007.86x = 142,139.10 × 57,679.54
  4. Step 4: Simplify right side
    103,007.86x = 8,198,517,904.01
  5. Step 5: Solve for x
    x = 8,198,517,904.01/103,007.86
  6. Step 6: Final answer
    x = 79,591.19

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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.