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Finding the Fourth Proportional to 118,933.60, 178,400.40 and 66,445.60

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Solution

The fourth proportional to 118,933.60, 178,400.40 and 66,445.60 is: 99,668.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,933.60 : 178,400.40 = 66,445.60 : x
  2. Step 2: Convert to fraction form
    118,933.60/178,400.40 = 66,445.60/x
  3. Step 3: Cross multiply
    118,933.60x = 178,400.40 × 66,445.60
  4. Step 4: Simplify right side
    118,933.60x = 11,853,921,618.24
  5. Step 5: Solve for x
    x = 11,853,921,618.24/118,933.60
  6. Step 6: Final answer
    x = 99,668.40

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1.5x scale

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.