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Finding the Fourth Proportional to 118,898.28, 178,357.14 and 39,991.32

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Solution

The fourth proportional to 118,898.28, 178,357.14 and 39,991.32 is: 59,990.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,898.28 : 178,357.14 = 39,991.32 : x
  2. Step 2: Convert to fraction form
    118,898.28/178,357.14 = 39,991.32/x
  3. Step 3: Cross multiply
    118,898.28x = 178,357.14 × 39,991.32
  4. Step 4: Simplify right side
    118,898.28x = 7,132,737,460.02
  5. Step 5: Solve for x
    x = 7,132,737,460.02/118,898.28
  6. Step 6: Final answer
    x = 59,990.25

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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.