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Finding the Fourth Proportional to 89,800, 134,700.68 and 39,866.68

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Solution

The fourth proportional to 89,800, 134,700.68 and 39,866.68 is: 59,800.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,800 : 134,700.68 = 39,866.68 : x
  2. Step 2: Convert to fraction form
    89,800/134,700.68 = 39,866.68/x
  3. Step 3: Cross multiply
    89,800x = 134,700.68 × 39,866.68
  4. Step 4: Simplify right side
    89,800x = 5,370,068,032.51
  5. Step 5: Solve for x
    x = 5,370,068,032.51/89,800
  6. Step 6: Final answer
    x = 59,800.31

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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.