Home / 100,280.19-138,386.69-54,959.97

Finding the Fourth Proportional to 100,280.19, 138,386.69 and 54,959.97

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Solution

The fourth proportional to 100,280.19, 138,386.69 and 54,959.97 is: 75,844.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,280.19 : 138,386.69 = 54,959.97 : x
  2. Step 2: Convert to fraction form
    100,280.19/138,386.69 = 54,959.97/x
  3. Step 3: Cross multiply
    100,280.19x = 138,386.69 × 54,959.97
  4. Step 4: Simplify right side
    100,280.19x = 7,605,728,056.00
  5. Step 5: Solve for x
    x = 7,605,728,056.00/100,280.19
  6. Step 6: Final answer
    x = 75,844.77

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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.