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Finding the Fourth Proportional to 151,509.62, 209,101.20 and 91,111.16

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Solution

The fourth proportional to 151,509.62, 209,101.20 and 91,111.16 is: 125,744.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,509.62 : 209,101.20 = 91,111.16 : x
  2. Step 2: Convert to fraction form
    151,509.62/209,101.20 = 91,111.16/x
  3. Step 3: Cross multiply
    151,509.62x = 209,101.20 × 91,111.16
  4. Step 4: Simplify right side
    151,509.62x = 19,051,452,889.39
  5. Step 5: Solve for x
    x = 19,051,452,889.39/151,509.62
  6. Step 6: Final answer
    x = 125,744.18

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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.