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Finding the Fourth Proportional to 111,809.84, 154,295.40 and 61,507.76

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Solution

The fourth proportional to 111,809.84, 154,295.40 and 61,507.76 is: 84,879.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,809.84 : 154,295.40 = 61,507.76 : x
  2. Step 2: Convert to fraction form
    111,809.84/154,295.40 = 61,507.76/x
  3. Step 3: Cross multiply
    111,809.84x = 154,295.40 × 61,507.76
  4. Step 4: Simplify right side
    111,809.84x = 9,490,364,432.30
  5. Step 5: Solve for x
    x = 9,490,364,432.30/111,809.84
  6. Step 6: Final answer
    x = 84,879.51

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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.