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Finding the Fourth Proportional to 157,765.66, 217,715.52 and 86,145.64

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Solution

The fourth proportional to 157,765.66, 217,715.52 and 86,145.64 is: 118,880.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,765.66 : 217,715.52 = 86,145.64 : x
  2. Step 2: Convert to fraction form
    157,765.66/217,715.52 = 86,145.64/x
  3. Step 3: Cross multiply
    157,765.66x = 217,715.52 × 86,145.64
  4. Step 4: Simplify right side
    157,765.66x = 18,755,242,808.33
  5. Step 5: Solve for x
    x = 18,755,242,808.33/157,765.66
  6. Step 6: Final answer
    x = 118,880.39

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1.5x scale

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.