Home / 131,819.16-181,909.53-71,388.42

Finding the Fourth Proportional to 131,819.16, 181,909.53 and 71,388.42

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Solution

The fourth proportional to 131,819.16, 181,909.53 and 71,388.42 is: 98,515.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,819.16 : 181,909.53 = 71,388.42 : x
  2. Step 2: Convert to fraction form
    131,819.16/181,909.53 = 71,388.42/x
  3. Step 3: Cross multiply
    131,819.16x = 181,909.53 × 71,388.42
  4. Step 4: Simplify right side
    131,819.16x = 12,986,233,929.64
  5. Step 5: Solve for x
    x = 12,986,233,929.64/131,819.16
  6. Step 6: Final answer
    x = 98,515.53

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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.