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Finding the Fourth Proportional to 111,718.90, 154,120.71 and 98,985.07

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Solution

The fourth proportional to 111,718.90, 154,120.71 and 98,985.07 is: 136,553.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,718.90 : 154,120.71 = 98,985.07 : x
  2. Step 2: Convert to fraction form
    111,718.90/154,120.71 = 98,985.07/x
  3. Step 3: Cross multiply
    111,718.90x = 154,120.71 × 98,985.07
  4. Step 4: Simplify right side
    111,718.90x = 15,255,649,267.80
  5. Step 5: Solve for x
    x = 15,255,649,267.80/111,718.90
  6. Step 6: Final answer
    x = 136,553.88

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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.