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Finding the Fourth Proportional to 100,039.08, 137,893.68 and 67,763.76

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Solution

The fourth proportional to 100,039.08, 137,893.68 and 67,763.76 is: 93,405.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,039.08 : 137,893.68 = 67,763.76 : x
  2. Step 2: Convert to fraction form
    100,039.08/137,893.68 = 67,763.76/x
  3. Step 3: Cross multiply
    100,039.08x = 137,893.68 × 67,763.76
  4. Step 4: Simplify right side
    100,039.08x = 9,344,194,237.04
  5. Step 5: Solve for x
    x = 9,344,194,237.04/100,039.08
  6. Step 6: Final answer
    x = 93,405.44

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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.