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Finding the Fourth Proportional to 153,911.90, 212,401.74 and 85,001.16

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Solution

The fourth proportional to 153,911.90, 212,401.74 and 85,001.16 is: 117,303.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,911.90 : 212,401.74 = 85,001.16 : x
  2. Step 2: Convert to fraction form
    153,911.90/212,401.74 = 85,001.16/x
  3. Step 3: Cross multiply
    153,911.90x = 212,401.74 × 85,001.16
  4. Step 4: Simplify right side
    153,911.90x = 18,054,394,286.02
  5. Step 5: Solve for x
    x = 18,054,394,286.02/153,911.90
  6. Step 6: Final answer
    x = 117,303.43

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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.