Home / 100,698.21-138,960.59-55,376.15

Finding the Fourth Proportional to 100,698.21, 138,960.59 and 55,376.15

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Solution

The fourth proportional to 100,698.21, 138,960.59 and 55,376.15 is: 76,417.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,698.21 : 138,960.59 = 55,376.15 : x
  2. Step 2: Convert to fraction form
    100,698.21/138,960.59 = 55,376.15/x
  3. Step 3: Cross multiply
    100,698.21x = 138,960.59 × 55,376.15
  4. Step 4: Simplify right side
    100,698.21x = 7,695,101,504.24
  5. Step 5: Solve for x
    x = 7,695,101,504.24/100,698.21
  6. Step 6: Final answer
    x = 76,417.46

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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.