Home / 138,607.64-206,908.79-121,792.58

Finding the Fourth Proportional to 138,607.64, 206,908.79 and 121,792.58

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Solution

The fourth proportional to 138,607.64, 206,908.79 and 121,792.58 is: 181,807.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,607.64 : 206,908.79 = 121,792.58 : x
  2. Step 2: Convert to fraction form
    138,607.64/206,908.79 = 121,792.58/x
  3. Step 3: Cross multiply
    138,607.64x = 206,908.79 × 121,792.58
  4. Step 4: Simplify right side
    138,607.64x = 25,199,955,358.78
  5. Step 5: Solve for x
    x = 25,199,955,358.78/138,607.64
  6. Step 6: Final answer
    x = 181,807.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.