Home / 115,778.63-159,780.40-68,047.36

Finding the Fourth Proportional to 115,778.63, 159,780.40 and 68,047.36

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Solution

The fourth proportional to 115,778.63, 159,780.40 and 68,047.36 is: 93,908.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,778.63 : 159,780.40 = 68,047.36 : x
  2. Step 2: Convert to fraction form
    115,778.63/159,780.40 = 68,047.36/x
  3. Step 3: Cross multiply
    115,778.63x = 159,780.40 × 68,047.36
  4. Step 4: Simplify right side
    115,778.63x = 10,872,633,830.17
  5. Step 5: Solve for x
    x = 10,872,633,830.17/115,778.63
  6. Step 6: Final answer
    x = 93,908.81

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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.