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Finding the Fourth Proportional to 73,118.80, 109,793.40 and 42,014.80

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Solution

The fourth proportional to 73,118.80, 109,793.40 and 42,014.80 is: 63,088.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,118.80 : 109,793.40 = 42,014.80 : x
  2. Step 2: Convert to fraction form
    73,118.80/109,793.40 = 42,014.80/x
  3. Step 3: Cross multiply
    73,118.80x = 109,793.40 × 42,014.80
  4. Step 4: Simplify right side
    73,118.80x = 4,612,947,742.32
  5. Step 5: Solve for x
    x = 4,612,947,742.32/73,118.80
  6. Step 6: Final answer
    x = 63,088.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.