Home / 123,478.78-170,401.17-66,890.02

Finding the Fourth Proportional to 123,478.78, 170,401.17 and 66,890.02

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Solution

The fourth proportional to 123,478.78, 170,401.17 and 66,890.02 is: 92,308.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,478.78 : 170,401.17 = 66,890.02 : x
  2. Step 2: Convert to fraction form
    123,478.78/170,401.17 = 66,890.02/x
  3. Step 3: Cross multiply
    123,478.78x = 170,401.17 × 66,890.02
  4. Step 4: Simplify right side
    123,478.78x = 11,398,137,669.32
  5. Step 5: Solve for x
    x = 11,398,137,669.32/123,478.78
  6. Step 6: Final answer
    x = 92,308.47

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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.