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Finding the Fourth Proportional to 93,781.82, 129,419.01 and 51,340.45

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Solution

The fourth proportional to 93,781.82, 129,419.01 and 51,340.45 is: 70,849.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,781.82 : 129,419.01 = 51,340.45 : x
  2. Step 2: Convert to fraction form
    93,781.82/129,419.01 = 51,340.45/x
  3. Step 3: Cross multiply
    93,781.82x = 129,419.01 × 51,340.45
  4. Step 4: Simplify right side
    93,781.82x = 6,644,430,211.95
  5. Step 5: Solve for x
    x = 6,644,430,211.95/93,781.82
  6. Step 6: Final answer
    x = 70,849.87

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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.