Home / 138,644.18-191,329.01-78,227.62

Finding the Fourth Proportional to 138,644.18, 191,329.01 and 78,227.62

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Solution

The fourth proportional to 138,644.18, 191,329.01 and 78,227.62 is: 107,954.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,644.18 : 191,329.01 = 78,227.62 : x
  2. Step 2: Convert to fraction form
    138,644.18/191,329.01 = 78,227.62/x
  3. Step 3: Cross multiply
    138,644.18x = 191,329.01 × 78,227.62
  4. Step 4: Simplify right side
    138,644.18x = 14,967,213,809.39
  5. Step 5: Solve for x
    x = 14,967,213,809.39/138,644.18
  6. Step 6: Final answer
    x = 107,954.14

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1.5x scale

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.