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Finding the Fourth Proportional to 73,247.70, 109,871.55 and 42,143.70

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Solution

The fourth proportional to 73,247.70, 109,871.55 and 42,143.70 is: 63,215.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,247.70 : 109,871.55 = 42,143.70 : x
  2. Step 2: Convert to fraction form
    73,247.70/109,871.55 = 42,143.70/x
  3. Step 3: Cross multiply
    73,247.70x = 109,871.55 × 42,143.70
  4. Step 4: Simplify right side
    73,247.70x = 4,630,393,641.74
  5. Step 5: Solve for x
    x = 4,630,393,641.74/73,247.70
  6. Step 6: Final answer
    x = 63,215.55

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1.5x scale

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.