Home / 100,208.13-138,287.28-54,886.10

Finding the Fourth Proportional to 100,208.13, 138,287.28 and 54,886.10

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Solution

The fourth proportional to 100,208.13, 138,287.28 and 54,886.10 is: 75,742.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,208.13 : 138,287.28 = 54,886.10 : x
  2. Step 2: Convert to fraction form
    100,208.13/138,287.28 = 54,886.10/x
  3. Step 3: Cross multiply
    100,208.13x = 138,287.28 × 54,886.10
  4. Step 4: Simplify right side
    100,208.13x = 7,590,048,787.37
  5. Step 5: Solve for x
    x = 7,590,048,787.37/100,208.13
  6. Step 6: Final answer
    x = 75,742.84

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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.