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Finding the Fourth Proportional to 92,910.85, 128,214.82 and 54,146.20

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Solution

The fourth proportional to 92,910.85, 128,214.82 and 54,146.20 is: 74,720.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,910.85 : 128,214.82 = 54,146.20 : x
  2. Step 2: Convert to fraction form
    92,910.85/128,214.82 = 54,146.20/x
  3. Step 3: Cross multiply
    92,910.85x = 128,214.82 × 54,146.20
  4. Step 4: Simplify right side
    92,910.85x = 6,942,344,830.78
  5. Step 5: Solve for x
    x = 6,942,344,830.78/92,910.85
  6. Step 6: Final answer
    x = 74,720.50

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1.5x scale

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.