Home / 161,019.23-222,161.40-100,651.28

Finding the Fourth Proportional to 161,019.23, 222,161.40 and 100,651.28

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Solution

The fourth proportional to 161,019.23, 222,161.40 and 100,651.28 is: 138,870.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,019.23 : 222,161.40 = 100,651.28 : x
  2. Step 2: Convert to fraction form
    161,019.23/222,161.40 = 100,651.28/x
  3. Step 3: Cross multiply
    161,019.23x = 222,161.40 × 100,651.28
  4. Step 4: Simplify right side
    161,019.23x = 22,360,828,165.79
  5. Step 5: Solve for x
    x = 22,360,828,165.79/161,019.23
  6. Step 6: Final answer
    x = 138,870.55

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1.5x scale

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.