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Finding the Fourth Proportional to 121,019.40, 181,529.10 and 115,900.20

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Solution

The fourth proportional to 121,019.40, 181,529.10 and 115,900.20 is: 173,850.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,019.40 : 181,529.10 = 115,900.20 : x
  2. Step 2: Convert to fraction form
    121,019.40/181,529.10 = 115,900.20/x
  3. Step 3: Cross multiply
    121,019.40x = 181,529.10 × 115,900.20
  4. Step 4: Simplify right side
    121,019.40x = 21,039,258,995.82
  5. Step 5: Solve for x
    x = 21,039,258,995.82/121,019.40
  6. Step 6: Final answer
    x = 173,850.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.