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Finding the Fourth Proportional to 86,439.60, 119,015.20 and 73,493.42

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Solution

The fourth proportional to 86,439.60, 119,015.20 and 73,493.42 is: 101,190.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,439.60 : 119,015.20 = 73,493.42 : x
  2. Step 2: Convert to fraction form
    86,439.60/119,015.20 = 73,493.42/x
  3. Step 3: Cross multiply
    86,439.60x = 119,015.20 × 73,493.42
  4. Step 4: Simplify right side
    86,439.60x = 8,746,834,079.98
  5. Step 5: Solve for x
    x = 8,746,834,079.98/86,439.60
  6. Step 6: Final answer
    x = 101,190.13

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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.