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Finding the Fourth Proportional to 128,865.34, 193,251.69 and 44,602.63

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Solution

The fourth proportional to 128,865.34, 193,251.69 and 44,602.63 is: 66,887.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,865.34 : 193,251.69 = 44,602.63 : x
  2. Step 2: Convert to fraction form
    128,865.34/193,251.69 = 44,602.63/x
  3. Step 3: Cross multiply
    128,865.34x = 193,251.69 × 44,602.63
  4. Step 4: Simplify right side
    128,865.34x = 8,619,533,625.94
  5. Step 5: Solve for x
    x = 8,619,533,625.94/128,865.34
  6. Step 6: Final answer
    x = 66,887.91

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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.