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Finding the Fourth Proportional to 84,990.72, 117,285.12 and 49,175.76

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Solution

The fourth proportional to 84,990.72, 117,285.12 and 49,175.76 is: 67,861.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,990.72 : 117,285.12 = 49,175.76 : x
  2. Step 2: Convert to fraction form
    84,990.72/117,285.12 = 49,175.76/x
  3. Step 3: Cross multiply
    84,990.72x = 117,285.12 × 49,175.76
  4. Step 4: Simplify right side
    84,990.72x = 5,767,584,912.69
  5. Step 5: Solve for x
    x = 5,767,584,912.69/84,990.72
  6. Step 6: Final answer
    x = 67,861.35

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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.