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Finding the Fourth Proportional to 89,992.80, 134,905.04 and 40,045.80

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Solution

The fourth proportional to 89,992.80, 134,905.04 and 40,045.80 is: 60,031.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,992.80 : 134,905.04 = 40,045.80 : x
  2. Step 2: Convert to fraction form
    89,992.80/134,905.04 = 40,045.80/x
  3. Step 3: Cross multiply
    89,992.80x = 134,905.04 × 40,045.80
  4. Step 4: Simplify right side
    89,992.80x = 5,402,380,250.83
  5. Step 5: Solve for x
    x = 5,402,380,250.83/89,992.80
  6. Step 6: Final answer
    x = 60,031.25

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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.