Home / 78,238.66-117,377.65-36,148.53

Finding the Fourth Proportional to 78,238.66, 117,377.65 and 36,148.53

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Solution

The fourth proportional to 78,238.66, 117,377.65 and 36,148.53 is: 54,231.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,238.66 : 117,377.65 = 36,148.53 : x
  2. Step 2: Convert to fraction form
    78,238.66/117,377.65 = 36,148.53/x
  3. Step 3: Cross multiply
    78,238.66x = 117,377.65 × 36,148.53
  4. Step 4: Simplify right side
    78,238.66x = 4,243,029,005.84
  5. Step 5: Solve for x
    x = 4,243,029,005.84/78,238.66
  6. Step 6: Final answer
    x = 54,231.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.