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Finding the Fourth Proportional to 121,498.20, 181,955.70 and 98,170.20

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Solution

The fourth proportional to 121,498.20, 181,955.70 and 98,170.20 is: 147,019.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,498.20 : 181,955.70 = 98,170.20 : x
  2. Step 2: Convert to fraction form
    121,498.20/181,955.70 = 98,170.20/x
  3. Step 3: Cross multiply
    121,498.20x = 181,955.70 × 98,170.20
  4. Step 4: Simplify right side
    121,498.20x = 17,862,627,460.14
  5. Step 5: Solve for x
    x = 17,862,627,460.14/121,498.20
  6. Step 6: Final answer
    x = 147,019.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.