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Finding the Fourth Proportional to 86,168.40, 129,270.78 and 43,498.14

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Solution

The fourth proportional to 86,168.40, 129,270.78 and 43,498.14 is: 65,256.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,168.40 : 129,270.78 = 43,498.14 : x
  2. Step 2: Convert to fraction form
    86,168.40/129,270.78 = 43,498.14/x
  3. Step 3: Cross multiply
    86,168.40x = 129,270.78 × 43,498.14
  4. Step 4: Simplify right side
    86,168.40x = 5,623,038,486.35
  5. Step 5: Solve for x
    x = 5,623,038,486.35/86,168.40
  6. Step 6: Final answer
    x = 65,256.39

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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.