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Finding the Fourth Proportional to 89,603.21, 134,423.20 and 74,914.77

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Solution

The fourth proportional to 89,603.21, 134,423.20 and 74,914.77 is: 112,387.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,603.21 : 134,423.20 = 74,914.77 : x
  2. Step 2: Convert to fraction form
    89,603.21/134,423.20 = 74,914.77/x
  3. Step 3: Cross multiply
    89,603.21x = 134,423.20 × 74,914.77
  4. Step 4: Simplify right side
    89,603.21x = 10,070,283,287.00
  5. Step 5: Solve for x
    x = 10,070,283,287.00/89,603.21
  6. Step 6: Final answer
    x = 112,387.53

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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.