Home / 119,138.06-164,389.28-78,837.05

Finding the Fourth Proportional to 119,138.06, 164,389.28 and 78,837.05

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Solution

The fourth proportional to 119,138.06, 164,389.28 and 78,837.05 is: 108,781.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,138.06 : 164,389.28 = 78,837.05 : x
  2. Step 2: Convert to fraction form
    119,138.06/164,389.28 = 78,837.05/x
  3. Step 3: Cross multiply
    119,138.06x = 164,389.28 × 78,837.05
  4. Step 4: Simplify right side
    119,138.06x = 12,959,964,670.69
  5. Step 5: Solve for x
    x = 12,959,964,670.69/119,138.06
  6. Step 6: Final answer
    x = 108,781.07

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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.