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Finding the Fourth Proportional to 77,813.68, 116,830.16 and 39,890.56

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Solution

The fourth proportional to 77,813.68, 116,830.16 and 39,890.56 is: 59,892.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,813.68 : 116,830.16 = 39,890.56 : x
  2. Step 2: Convert to fraction form
    77,813.68/116,830.16 = 39,890.56/x
  3. Step 3: Cross multiply
    77,813.68x = 116,830.16 × 39,890.56
  4. Step 4: Simplify right side
    77,813.68x = 4,660,420,507.29
  5. Step 5: Solve for x
    x = 4,660,420,507.29/77,813.68
  6. Step 6: Final answer
    x = 59,892.05

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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.