Home / 115,009.18-158,722.38-64,717.90

Finding the Fourth Proportional to 115,009.18, 158,722.38 and 64,717.90

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Solution

The fourth proportional to 115,009.18, 158,722.38 and 64,717.90 is: 89,316.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,009.18 : 158,722.38 = 64,717.90 : x
  2. Step 2: Convert to fraction form
    115,009.18/158,722.38 = 64,717.90/x
  3. Step 3: Cross multiply
    115,009.18x = 158,722.38 × 64,717.90
  4. Step 4: Simplify right side
    115,009.18x = 10,272,178,719.80
  5. Step 5: Solve for x
    x = 10,272,178,719.80/115,009.18
  6. Step 6: Final answer
    x = 89,316.17

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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.