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Finding the Fourth Proportional to 111,578.74, 153,981.81 and 61,280.98

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Solution

The fourth proportional to 111,578.74, 153,981.81 and 61,280.98 is: 84,569.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,578.74 : 153,981.81 = 61,280.98 : x
  2. Step 2: Convert to fraction form
    111,578.74/153,981.81 = 61,280.98/x
  3. Step 3: Cross multiply
    111,578.74x = 153,981.81 × 61,280.98
  4. Step 4: Simplify right side
    111,578.74x = 9,436,156,218.97
  5. Step 5: Solve for x
    x = 9,436,156,218.97/111,578.74
  6. Step 6: Final answer
    x = 84,569.48

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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.