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Finding the Fourth Proportional to 157,807.86, 217,771.49 and 86,188.17

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Solution

The fourth proportional to 157,807.86, 217,771.49 and 86,188.17 is: 118,937.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,807.86 : 217,771.49 = 86,188.17 : x
  2. Step 2: Convert to fraction form
    157,807.86/217,771.49 = 86,188.17/x
  3. Step 3: Cross multiply
    157,807.86x = 217,771.49 × 86,188.17
  4. Step 4: Simplify right side
    157,807.86x = 18,769,325,523.61
  5. Step 5: Solve for x
    x = 18,769,325,523.61/157,807.86
  6. Step 6: Final answer
    x = 118,937.84

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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.