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Finding the Fourth Proportional to 121,398.69, 181,199.10 and 113,919.15

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Solution

The fourth proportional to 121,398.69, 181,199.10 and 113,919.15 is: 170,035.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,398.69 : 181,199.10 = 113,919.15 : x
  2. Step 2: Convert to fraction form
    121,398.69/181,199.10 = 113,919.15/x
  3. Step 3: Cross multiply
    121,398.69x = 181,199.10 × 113,919.15
  4. Step 4: Simplify right side
    121,398.69x = 20,642,047,452.77
  5. Step 5: Solve for x
    x = 20,642,047,452.77/121,398.69
  6. Step 6: Final answer
    x = 170,035.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.