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Finding the Fourth Proportional to 153,170.90, 211,373.97 and 86,102.90

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Solution

The fourth proportional to 153,170.90, 211,373.97 and 86,102.90 is: 118,820.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,170.90 : 211,373.97 = 86,102.90 : x
  2. Step 2: Convert to fraction form
    153,170.90/211,373.97 = 86,102.90/x
  3. Step 3: Cross multiply
    153,170.90x = 211,373.97 × 86,102.90
  4. Step 4: Simplify right side
    153,170.90x = 18,199,912,007.06
  5. Step 5: Solve for x
    x = 18,199,912,007.06/153,170.90
  6. Step 6: Final answer
    x = 118,820.95

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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.