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Finding the Fourth Proportional to 99,993.88, 137,993.03 and 67,738.36

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Solution

The fourth proportional to 99,993.88, 137,993.03 and 67,738.36 is: 93,479.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,993.88 : 137,993.03 = 67,738.36 : x
  2. Step 2: Convert to fraction form
    99,993.88/137,993.03 = 67,738.36/x
  3. Step 3: Cross multiply
    99,993.88x = 137,993.03 × 67,738.36
  4. Step 4: Simplify right side
    99,993.88x = 9,347,421,543.63
  5. Step 5: Solve for x
    x = 9,347,421,543.63/99,993.88
  6. Step 6: Final answer
    x = 93,479.94

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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.