Home / 78,576.77-108,438.26-42,769.10

Finding the Fourth Proportional to 78,576.77, 108,438.26 and 42,769.10

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Solution

The fourth proportional to 78,576.77, 108,438.26 and 42,769.10 is: 59,022.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,576.77 : 108,438.26 = 42,769.10 : x
  2. Step 2: Convert to fraction form
    78,576.77/108,438.26 = 42,769.10/x
  3. Step 3: Cross multiply
    78,576.77x = 108,438.26 × 42,769.10
  4. Step 4: Simplify right side
    78,576.77x = 4,637,806,785.77
  5. Step 5: Solve for x
    x = 4,637,806,785.77/78,576.77
  6. Step 6: Final answer
    x = 59,022.62

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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.