Home / 103,176.53-142,442.60-78,932.82

Finding the Fourth Proportional to 103,176.53, 142,442.60 and 78,932.82

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Solution

The fourth proportional to 103,176.53, 142,442.60 and 78,932.82 is: 108,972.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,176.53 : 142,442.60 = 78,932.82 : x
  2. Step 2: Convert to fraction form
    103,176.53/142,442.60 = 78,932.82/x
  3. Step 3: Cross multiply
    103,176.53x = 142,442.60 × 78,932.82
  4. Step 4: Simplify right side
    103,176.53x = 11,243,395,711.47
  5. Step 5: Solve for x
    x = 11,243,395,711.47/103,176.53
  6. Step 6: Final answer
    x = 108,972.42

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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.