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Finding the Fourth Proportional to 74,811.60, 103,245.84 and 42,991.56

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Solution

The fourth proportional to 74,811.60, 103,245.84 and 42,991.56 is: 59,331.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,811.60 : 103,245.84 = 42,991.56 : x
  2. Step 2: Convert to fraction form
    74,811.60/103,245.84 = 42,991.56/x
  3. Step 3: Cross multiply
    74,811.60x = 103,245.84 × 42,991.56
  4. Step 4: Simplify right side
    74,811.60x = 4,438,699,725.11
  5. Step 5: Solve for x
    x = 4,438,699,725.11/74,811.60
  6. Step 6: Final answer
    x = 59,331.70

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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.