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Finding the Fourth Proportional to 153,998.55, 212,515.72 and 86,016.51

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Solution

The fourth proportional to 153,998.55, 212,515.72 and 86,016.51 is: 118,701.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,998.55 : 212,515.72 = 86,016.51 : x
  2. Step 2: Convert to fraction form
    153,998.55/212,515.72 = 86,016.51/x
  3. Step 3: Cross multiply
    153,998.55x = 212,515.72 × 86,016.51
  4. Step 4: Simplify right side
    153,998.55x = 18,279,860,554.54
  5. Step 5: Solve for x
    x = 18,279,860,554.54/153,998.55
  6. Step 6: Final answer
    x = 118,701.51

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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.