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Finding the Fourth Proportional to 76,671.62, 105,806.08 and 42,679.56

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Solution

The fourth proportional to 76,671.62, 105,806.08 and 42,679.56 is: 58,897.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,671.62 : 105,806.08 = 42,679.56 : x
  2. Step 2: Convert to fraction form
    76,671.62/105,806.08 = 42,679.56/x
  3. Step 3: Cross multiply
    76,671.62x = 105,806.08 × 42,679.56
  4. Step 4: Simplify right side
    76,671.62x = 4,515,756,939.72
  5. Step 5: Solve for x
    x = 4,515,756,939.72/76,671.62
  6. Step 6: Final answer
    x = 58,897.37

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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.