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Finding the Fourth Proportional to 69,021.66, 103,663.70 and 42,908.88

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Solution

The fourth proportional to 69,021.66, 103,663.70 and 42,908.88 is: 64,444.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,021.66 : 103,663.70 = 42,908.88 : x
  2. Step 2: Convert to fraction form
    69,021.66/103,663.70 = 42,908.88/x
  3. Step 3: Cross multiply
    69,021.66x = 103,663.70 × 42,908.88
  4. Step 4: Simplify right side
    69,021.66x = 4,448,093,263.66
  5. Step 5: Solve for x
    x = 4,448,093,263.66/69,021.66
  6. Step 6: Final answer
    x = 64,444.89

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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.