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Finding the Fourth Proportional to 99,479.70, 137,405.34 and 72,212.22

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Solution

The fourth proportional to 99,479.70, 137,405.34 and 72,212.22 is: 99,742.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,479.70 : 137,405.34 = 72,212.22 : x
  2. Step 2: Convert to fraction form
    99,479.70/137,405.34 = 72,212.22/x
  3. Step 3: Cross multiply
    99,479.70x = 137,405.34 × 72,212.22
  4. Step 4: Simplify right side
    99,479.70x = 9,922,344,641.25
  5. Step 5: Solve for x
    x = 9,922,344,641.25/99,479.70
  6. Step 6: Final answer
    x = 99,742.41

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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.