Home / 138,665.42-191,341.80-78,232.53

Finding the Fourth Proportional to 138,665.42, 191,341.80 and 78,232.53

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Solution

The fourth proportional to 138,665.42, 191,341.80 and 78,232.53 is: 107,951.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,665.42 : 191,341.80 = 78,232.53 : x
  2. Step 2: Convert to fraction form
    138,665.42/191,341.80 = 78,232.53/x
  3. Step 3: Cross multiply
    138,665.42x = 191,341.80 × 78,232.53
  4. Step 4: Simplify right side
    138,665.42x = 14,969,153,108.75
  5. Step 5: Solve for x
    x = 14,969,153,108.75/138,665.42
  6. Step 6: Final answer
    x = 107,951.60

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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.