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Finding the Fourth Proportional to 86,266.60, 129,347.10 and 33,615.40

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Solution

The fourth proportional to 86,266.60, 129,347.10 and 33,615.40 is: 50,402.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,266.60 : 129,347.10 = 33,615.40 : x
  2. Step 2: Convert to fraction form
    86,266.60/129,347.10 = 33,615.40/x
  3. Step 3: Cross multiply
    86,266.60x = 129,347.10 × 33,615.40
  4. Step 4: Simplify right side
    86,266.60x = 4,348,054,505.34
  5. Step 5: Solve for x
    x = 4,348,054,505.34/86,266.60
  6. Step 6: Final answer
    x = 50,402.53

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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.