Home / 138,869.32-208,136.94-79,742.92

Finding the Fourth Proportional to 138,869.32, 208,136.94 and 79,742.92

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Solution

The fourth proportional to 138,869.32, 208,136.94 and 79,742.92 is: 119,518.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,869.32 : 208,136.94 = 79,742.92 : x
  2. Step 2: Convert to fraction form
    138,869.32/208,136.94 = 79,742.92/x
  3. Step 3: Cross multiply
    138,869.32x = 208,136.94 × 79,742.92
  4. Step 4: Simplify right side
    138,869.32x = 16,597,447,355.46
  5. Step 5: Solve for x
    x = 16,597,447,355.46/138,869.32
  6. Step 6: Final answer
    x = 119,518.46

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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.