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Finding the Fourth Proportional to 153,999.85, 212,517.54 and 86,017.79

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Solution

The fourth proportional to 153,999.85, 212,517.54 and 86,017.79 is: 118,703.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,999.85 : 212,517.54 = 86,017.79 : x
  2. Step 2: Convert to fraction form
    153,999.85/212,517.54 = 86,017.79/x
  3. Step 3: Cross multiply
    153,999.85x = 212,517.54 × 86,017.79
  4. Step 4: Simplify right side
    153,999.85x = 18,280,289,127.04
  5. Step 5: Solve for x
    x = 18,280,289,127.04/153,999.85
  6. Step 6: Final answer
    x = 118,703.29

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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.