Home / 138,400.56-191,023.86-90,626.16

Finding the Fourth Proportional to 138,400.56, 191,023.86 and 90,626.16

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Solution

The fourth proportional to 138,400.56, 191,023.86 and 90,626.16 is: 125,084.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,400.56 : 191,023.86 = 90,626.16 : x
  2. Step 2: Convert to fraction form
    138,400.56/191,023.86 = 90,626.16/x
  3. Step 3: Cross multiply
    138,400.56x = 191,023.86 × 90,626.16
  4. Step 4: Simplify right side
    138,400.56x = 17,311,758,900.18
  5. Step 5: Solve for x
    x = 17,311,758,900.18/138,400.56
  6. Step 6: Final answer
    x = 125,084.46

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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.