Home / 126,665.16-174,832.47-78,890.28

Finding the Fourth Proportional to 126,665.16, 174,832.47 and 78,890.28

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Solution

The fourth proportional to 126,665.16, 174,832.47 and 78,890.28 is: 108,890.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,665.16 : 174,832.47 = 78,890.28 : x
  2. Step 2: Convert to fraction form
    126,665.16/174,832.47 = 78,890.28/x
  3. Step 3: Cross multiply
    126,665.16x = 174,832.47 × 78,890.28
  4. Step 4: Simplify right side
    126,665.16x = 13,792,582,511.39
  5. Step 5: Solve for x
    x = 13,792,582,511.39/126,665.16
  6. Step 6: Final answer
    x = 108,890.10

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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.