Home / 123,391.36-170,280.10-66,802.72

Finding the Fourth Proportional to 123,391.36, 170,280.10 and 66,802.72

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Solution

The fourth proportional to 123,391.36, 170,280.10 and 66,802.72 is: 92,187.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,391.36 : 170,280.10 = 66,802.72 : x
  2. Step 2: Convert to fraction form
    123,391.36/170,280.10 = 66,802.72/x
  3. Step 3: Cross multiply
    123,391.36x = 170,280.10 × 66,802.72
  4. Step 4: Simplify right side
    123,391.36x = 11,375,173,841.87
  5. Step 5: Solve for x
    x = 11,375,173,841.87/123,391.36
  6. Step 6: Final answer
    x = 92,187.77

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1.5x scale

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.