Home / 102,940.86-142,046.45-57,621.38

Finding the Fourth Proportional to 102,940.86, 142,046.45 and 57,621.38

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Solution

The fourth proportional to 102,940.86, 142,046.45 and 57,621.38 is: 79,510.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,940.86 : 142,046.45 = 57,621.38 : x
  2. Step 2: Convert to fraction form
    102,940.86/142,046.45 = 57,621.38/x
  3. Step 3: Cross multiply
    102,940.86x = 142,046.45 × 57,621.38
  4. Step 4: Simplify right side
    102,940.86x = 8,184,912,473.10
  5. Step 5: Solve for x
    x = 8,184,912,473.10/102,940.86
  6. Step 6: Final answer
    x = 79,510.82

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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.