Home / 78,579.41-108,439.58-42,769.68

Finding the Fourth Proportional to 78,579.41, 108,439.58 and 42,769.68

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Solution

The fourth proportional to 78,579.41, 108,439.58 and 42,769.68 is: 59,022.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,579.41 : 108,439.58 = 42,769.68 : x
  2. Step 2: Convert to fraction form
    78,579.41/108,439.58 = 42,769.68/x
  3. Step 3: Cross multiply
    78,579.41x = 108,439.58 × 42,769.68
  4. Step 4: Simplify right side
    78,579.41x = 4,637,926,135.93
  5. Step 5: Solve for x
    x = 4,637,926,135.93/78,579.41
  6. Step 6: Final answer
    x = 59,022.16

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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.