Home / 100,415.12-138,572.16-55,091.84

Finding the Fourth Proportional to 100,415.12, 138,572.16 and 55,091.84

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Solution

The fourth proportional to 100,415.12, 138,572.16 and 55,091.84 is: 76,026.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,415.12 : 138,572.16 = 55,091.84 : x
  2. Step 2: Convert to fraction form
    100,415.12/138,572.16 = 55,091.84/x
  3. Step 3: Cross multiply
    100,415.12x = 138,572.16 × 55,091.84
  4. Step 4: Simplify right side
    100,415.12x = 7,634,195,267.17
  5. Step 5: Solve for x
    x = 7,634,195,267.17/100,415.12
  6. Step 6: Final answer
    x = 76,026.35

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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.