Home / 138,356.06-190,949.45-77,938.34

Finding the Fourth Proportional to 138,356.06, 190,949.45 and 77,938.34

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Solution

The fourth proportional to 138,356.06, 190,949.45 and 77,938.34 is: 107,565.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,356.06 : 190,949.45 = 77,938.34 : x
  2. Step 2: Convert to fraction form
    138,356.06/190,949.45 = 77,938.34/x
  3. Step 3: Cross multiply
    138,356.06x = 190,949.45 × 77,938.34
  4. Step 4: Simplify right side
    138,356.06x = 14,882,281,812.47
  5. Step 5: Solve for x
    x = 14,882,281,812.47/138,356.06
  6. Step 6: Final answer
    x = 107,565.09

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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.