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Finding the Fourth Proportional to 74,803.52, 103,228.80 and 42,974.40

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Solution

The fourth proportional to 74,803.52, 103,228.80 and 42,974.40 is: 59,304.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,803.52 : 103,228.80 = 42,974.40 : x
  2. Step 2: Convert to fraction form
    74,803.52/103,228.80 = 42,974.40/x
  3. Step 3: Cross multiply
    74,803.52x = 103,228.80 × 42,974.40
  4. Step 4: Simplify right side
    74,803.52x = 4,436,195,742.72
  5. Step 5: Solve for x
    x = 4,436,195,742.72/74,803.52
  6. Step 6: Final answer
    x = 59,304.64

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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.