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Finding the Fourth Proportional to 74,804.81, 103,236.80 and 42,549.53

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Solution

The fourth proportional to 74,804.81, 103,236.80 and 42,549.53 is: 58,721.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,804.81 : 103,236.80 = 42,549.53 : x
  2. Step 2: Convert to fraction form
    74,804.81/103,236.80 = 42,549.53/x
  3. Step 3: Cross multiply
    74,804.81x = 103,236.80 × 42,549.53
  4. Step 4: Simplify right side
    74,804.81x = 4,392,676,589.77
  5. Step 5: Solve for x
    x = 4,392,676,589.77/74,804.81
  6. Step 6: Final answer
    x = 58,721.85

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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.