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Finding the Fourth Proportional to 98,700.39, 136,201.37 and 55,678.61

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Solution

The fourth proportional to 98,700.39, 136,201.37 and 55,678.61 is: 76,833.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,700.39 : 136,201.37 = 55,678.61 : x
  2. Step 2: Convert to fraction form
    98,700.39/136,201.37 = 55,678.61/x
  3. Step 3: Cross multiply
    98,700.39x = 136,201.37 × 55,678.61
  4. Step 4: Simplify right side
    98,700.39x = 7,583,503,023.81
  5. Step 5: Solve for x
    x = 7,583,503,023.81/98,700.39
  6. Step 6: Final answer
    x = 76,833.57

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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.