Home / 78,579.14-108,439.66-42,769.06

Finding the Fourth Proportional to 78,579.14, 108,439.66 and 42,769.06

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Solution

The fourth proportional to 78,579.14, 108,439.66 and 42,769.06 is: 59,021.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,579.14 : 108,439.66 = 42,769.06 : x
  2. Step 2: Convert to fraction form
    78,579.14/108,439.66 = 42,769.06/x
  3. Step 3: Cross multiply
    78,579.14x = 108,439.66 × 42,769.06
  4. Step 4: Simplify right side
    78,579.14x = 4,637,862,717.25
  5. Step 5: Solve for x
    x = 4,637,862,717.25/78,579.14
  6. Step 6: Final answer
    x = 59,021.55

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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.