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Finding the Fourth Proportional to 74,980.73, 103,473.60 and 40,989.62

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Solution

The fourth proportional to 74,980.73, 103,473.60 and 40,989.62 is: 56,565.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,980.73 : 103,473.60 = 40,989.62 : x
  2. Step 2: Convert to fraction form
    74,980.73/103,473.60 = 40,989.62/x
  3. Step 3: Cross multiply
    74,980.73x = 103,473.60 × 40,989.62
  4. Step 4: Simplify right side
    74,980.73x = 4,241,343,180.38
  5. Step 5: Solve for x
    x = 4,241,343,180.38/74,980.73
  6. Step 6: Final answer
    x = 56,565.78

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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.