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Finding the Fourth Proportional to 61,330.60, 91,995.90 and 19,781.80

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Solution

The fourth proportional to 61,330.60, 91,995.90 and 19,781.80 is: 29,672.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,330.60 : 91,995.90 = 19,781.80 : x
  2. Step 2: Convert to fraction form
    61,330.60/91,995.90 = 19,781.80/x
  3. Step 3: Cross multiply
    61,330.60x = 91,995.90 × 19,781.80
  4. Step 4: Simplify right side
    61,330.60x = 1,819,844,494.62
  5. Step 5: Solve for x
    x = 1,819,844,494.62/61,330.60
  6. Step 6: Final answer
    x = 29,672.70

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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.