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Finding the Fourth Proportional to 77,910.66, 107,516.75 and 42,100.67

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Solution

The fourth proportional to 77,910.66, 107,516.75 and 42,100.67 is: 58,098.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,910.66 : 107,516.75 = 42,100.67 : x
  2. Step 2: Convert to fraction form
    77,910.66/107,516.75 = 42,100.67/x
  3. Step 3: Cross multiply
    77,910.66x = 107,516.75 × 42,100.67
  4. Step 4: Simplify right side
    77,910.66x = 4,526,527,269.51
  5. Step 5: Solve for x
    x = 4,526,527,269.51/77,910.66
  6. Step 6: Final answer
    x = 58,098.95

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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.