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Finding the Fourth Proportional to 79,440, 109,627.95 and 43,630.75

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Solution

The fourth proportional to 79,440, 109,627.95 and 43,630.75 is: 60,210.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,440 : 109,627.95 = 43,630.75 : x
  2. Step 2: Convert to fraction form
    79,440/109,627.95 = 43,630.75/x
  3. Step 3: Cross multiply
    79,440x = 109,627.95 × 43,630.75
  4. Step 4: Simplify right side
    79,440x = 4,783,149,679.46
  5. Step 5: Solve for x
    x = 4,783,149,679.46/79,440
  6. Step 6: Final answer
    x = 60,210.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.