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Finding the Fourth Proportional to 77,543.97, 115,790.69 and 61,569.76

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Solution

The fourth proportional to 77,543.97, 115,790.69 and 61,569.76 is: 91,937.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,543.97 : 115,790.69 = 61,569.76 : x
  2. Step 2: Convert to fraction form
    77,543.97/115,790.69 = 61,569.76/x
  3. Step 3: Cross multiply
    77,543.97x = 115,790.69 × 61,569.76
  4. Step 4: Simplify right side
    77,543.97x = 7,129,204,993.53
  5. Step 5: Solve for x
    x = 7,129,204,993.53/77,543.97
  6. Step 6: Final answer
    x = 91,937.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.