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Finding the Fourth Proportional to 84,670.90, 126,960.98 and 28,492.34

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Solution

The fourth proportional to 84,670.90, 126,960.98 and 28,492.34 is: 42,723.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,670.90 : 126,960.98 = 28,492.34 : x
  2. Step 2: Convert to fraction form
    84,670.90/126,960.98 = 28,492.34/x
  3. Step 3: Cross multiply
    84,670.90x = 126,960.98 × 28,492.34
  4. Step 4: Simplify right side
    84,670.90x = 3,617,415,408.89
  5. Step 5: Solve for x
    x = 3,617,415,408.89/84,670.90
  6. Step 6: Final answer
    x = 42,723.24

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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.