Home / 136,864.15-188,877.92-78,720.79

Finding the Fourth Proportional to 136,864.15, 188,877.92 and 78,720.79

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Solution

The fourth proportional to 136,864.15, 188,877.92 and 78,720.79 is: 108,637.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,864.15 : 188,877.92 = 78,720.79 : x
  2. Step 2: Convert to fraction form
    136,864.15/188,877.92 = 78,720.79/x
  3. Step 3: Cross multiply
    136,864.15x = 188,877.92 × 78,720.79
  4. Step 4: Simplify right side
    136,864.15x = 14,868,618,254.49
  5. Step 5: Solve for x
    x = 14,868,618,254.49/136,864.15
  6. Step 6: Final answer
    x = 108,637.79

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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.