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Finding the Fourth Proportional to 89,851.60, 134,809.80 and 86,611.60

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Solution

The fourth proportional to 89,851.60, 134,809.80 and 86,611.60 is: 129,948.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,851.60 : 134,809.80 = 86,611.60 : x
  2. Step 2: Convert to fraction form
    89,851.60/134,809.80 = 86,611.60/x
  3. Step 3: Cross multiply
    89,851.60x = 134,809.80 × 86,611.60
  4. Step 4: Simplify right side
    89,851.60x = 11,676,092,473.68
  5. Step 5: Solve for x
    x = 11,676,092,473.68/89,851.60
  6. Step 6: Final answer
    x = 129,948.63

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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.