Home / 78,386.87-108,172.08-42,576.09

Finding the Fourth Proportional to 78,386.87, 108,172.08 and 42,576.09

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Solution

The fourth proportional to 78,386.87, 108,172.08 and 42,576.09 is: 58,754.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,386.87 : 108,172.08 = 42,576.09 : x
  2. Step 2: Convert to fraction form
    78,386.87/108,172.08 = 42,576.09/x
  3. Step 3: Cross multiply
    78,386.87x = 108,172.08 × 42,576.09
  4. Step 4: Simplify right side
    78,386.87x = 4,605,544,213.57
  5. Step 5: Solve for x
    x = 4,605,544,213.57/78,386.87
  6. Step 6: Final answer
    x = 58,754.03

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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.