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Finding the Fourth Proportional to 118,998.32, 178,254.48 and 66,435.80

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Solution

The fourth proportional to 118,998.32, 178,254.48 and 66,435.80 is: 99,518.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,998.32 : 178,254.48 = 66,435.80 : x
  2. Step 2: Convert to fraction form
    118,998.32/178,254.48 = 66,435.80/x
  3. Step 3: Cross multiply
    118,998.32x = 178,254.48 × 66,435.80
  4. Step 4: Simplify right side
    118,998.32x = 11,842,478,982.38
  5. Step 5: Solve for x
    x = 11,842,478,982.38/118,998.32
  6. Step 6: Final answer
    x = 99,518.04

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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.