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Finding the Fourth Proportional to 72,742.91, 100,370.16 and 42,522.39

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Solution

The fourth proportional to 72,742.91, 100,370.16 and 42,522.39 is: 58,672.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,742.91 : 100,370.16 = 42,522.39 : x
  2. Step 2: Convert to fraction form
    72,742.91/100,370.16 = 42,522.39/x
  3. Step 3: Cross multiply
    72,742.91x = 100,370.16 × 42,522.39
  4. Step 4: Simplify right side
    72,742.91x = 4,267,979,087.88
  5. Step 5: Solve for x
    x = 4,267,979,087.88/72,742.91
  6. Step 6: Final answer
    x = 58,672.10

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1.5x scale

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.