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Finding the Fourth Proportional to 118,731.02, 178,101.99 and 66,100.86

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Solution

The fourth proportional to 118,731.02, 178,101.99 and 66,100.86 is: 99,154.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,731.02 : 178,101.99 = 66,100.86 : x
  2. Step 2: Convert to fraction form
    118,731.02/178,101.99 = 66,100.86/x
  3. Step 3: Cross multiply
    118,731.02x = 178,101.99 × 66,100.86
  4. Step 4: Simplify right side
    118,731.02x = 11,772,694,706.71
  5. Step 5: Solve for x
    x = 11,772,694,706.71/118,731.02
  6. Step 6: Final answer
    x = 99,154.33

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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.