Home / 78,219.15-107,942.94-42,409.71

Finding the Fourth Proportional to 78,219.15, 107,942.94 and 42,409.71

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Solution

The fourth proportional to 78,219.15, 107,942.94 and 42,409.71 is: 58,525.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,219.15 : 107,942.94 = 42,409.71 : x
  2. Step 2: Convert to fraction form
    78,219.15/107,942.94 = 42,409.71/x
  3. Step 3: Cross multiply
    78,219.15x = 107,942.94 × 42,409.71
  4. Step 4: Simplify right side
    78,219.15x = 4,577,828,781.95
  5. Step 5: Solve for x
    x = 4,577,828,781.95/78,219.15
  6. Step 6: Final answer
    x = 58,525.68

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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.