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Finding the Fourth Proportional to 73,033.40, 100,787.39 and 42,840.50

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Solution

The fourth proportional to 73,033.40, 100,787.39 and 42,840.50 is: 59,120.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,033.40 : 100,787.39 = 42,840.50 : x
  2. Step 2: Convert to fraction form
    73,033.40/100,787.39 = 42,840.50/x
  3. Step 3: Cross multiply
    73,033.40x = 100,787.39 × 42,840.50
  4. Step 4: Simplify right side
    73,033.40x = 4,317,781,623.81
  5. Step 5: Solve for x
    x = 4,317,781,623.81/73,033.40
  6. Step 6: Final answer
    x = 59,120.65

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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.