Home / 100,112.16-138,152.88-55,400.16

Finding the Fourth Proportional to 100,112.16, 138,152.88 and 55,400.16

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Solution

The fourth proportional to 100,112.16, 138,152.88 and 55,400.16 is: 76,451.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,112.16 : 138,152.88 = 55,400.16 : x
  2. Step 2: Convert to fraction form
    100,112.16/138,152.88 = 55,400.16/x
  3. Step 3: Cross multiply
    100,112.16x = 138,152.88 × 55,400.16
  4. Step 4: Simplify right side
    100,112.16x = 7,653,691,656.46
  5. Step 5: Solve for x
    x = 7,653,691,656.46/100,112.16
  6. Step 6: Final answer
    x = 76,451.17

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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.