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Finding the Fourth Proportional to 99,602.45, 137,451.39 and 54,890.45

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Solution

The fourth proportional to 99,602.45, 137,451.39 and 54,890.45 is: 75,748.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,602.45 : 137,451.39 = 54,890.45 : x
  2. Step 2: Convert to fraction form
    99,602.45/137,451.39 = 54,890.45/x
  3. Step 3: Cross multiply
    99,602.45x = 137,451.39 × 54,890.45
  4. Step 4: Simplify right side
    99,602.45x = 7,544,768,650.23
  5. Step 5: Solve for x
    x = 7,544,768,650.23/99,602.45
  6. Step 6: Final answer
    x = 75,748.83

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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.