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Finding the Fourth Proportional to 128,937.60, 193,624.50 and 84,035.22

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Solution

The fourth proportional to 128,937.60, 193,624.50 and 84,035.22 is: 126,194.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,937.60 : 193,624.50 = 84,035.22 : x
  2. Step 2: Convert to fraction form
    128,937.60/193,624.50 = 84,035.22/x
  3. Step 3: Cross multiply
    128,937.60x = 193,624.50 × 84,035.22
  4. Step 4: Simplify right side
    128,937.60x = 16,271,277,454.89
  5. Step 5: Solve for x
    x = 16,271,277,454.89/128,937.60
  6. Step 6: Final answer
    x = 126,194.98

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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.