Home / 115,217.51-158,864.15-78,936.35

Finding the Fourth Proportional to 115,217.51, 158,864.15 and 78,936.35

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Solution

The fourth proportional to 115,217.51, 158,864.15 and 78,936.35 is: 108,838.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,217.51 : 158,864.15 = 78,936.35 : x
  2. Step 2: Convert to fraction form
    115,217.51/158,864.15 = 78,936.35/x
  3. Step 3: Cross multiply
    115,217.51x = 158,864.15 × 78,936.35
  4. Step 4: Simplify right side
    115,217.51x = 12,540,155,549.87
  5. Step 5: Solve for x
    x = 12,540,155,549.87/115,217.51
  6. Step 6: Final answer
    x = 108,838.98

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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.