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Finding the Fourth Proportional to 69,088.78, 103,633.16 and 45,709.76

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Solution

The fourth proportional to 69,088.78, 103,633.16 and 45,709.76 is: 68,564.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,088.78 : 103,633.16 = 45,709.76 : x
  2. Step 2: Convert to fraction form
    69,088.78/103,633.16 = 45,709.76/x
  3. Step 3: Cross multiply
    69,088.78x = 103,633.16 × 45,709.76
  4. Step 4: Simplify right side
    69,088.78x = 4,737,046,871.64
  5. Step 5: Solve for x
    x = 4,737,046,871.64/69,088.78
  6. Step 6: Final answer
    x = 68,564.63

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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.