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Finding the Fourth Proportional to 64,489.74, 88,999.83 and 42,942.54

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Solution

The fourth proportional to 64,489.74, 88,999.83 and 42,942.54 is: 59,263.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,489.74 : 88,999.83 = 42,942.54 : x
  2. Step 2: Convert to fraction form
    64,489.74/88,999.83 = 42,942.54/x
  3. Step 3: Cross multiply
    64,489.74x = 88,999.83 × 42,942.54
  4. Step 4: Simplify right side
    64,489.74x = 3,821,878,759.77
  5. Step 5: Solve for x
    x = 3,821,878,759.77/64,489.74
  6. Step 6: Final answer
    x = 59,263.36

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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.