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Finding the Fourth Proportional to 128,835.77, 193,308.72 and 66,550.01

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Solution

The fourth proportional to 128,835.77, 193,308.72 and 66,550.01 is: 99,853.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,835.77 : 193,308.72 = 66,550.01 : x
  2. Step 2: Convert to fraction form
    128,835.77/193,308.72 = 66,550.01/x
  3. Step 3: Cross multiply
    128,835.77x = 193,308.72 × 66,550.01
  4. Step 4: Simplify right side
    128,835.77x = 12,864,696,282.54
  5. Step 5: Solve for x
    x = 12,864,696,282.54/128,835.77
  6. Step 6: Final answer
    x = 99,853.46

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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.