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Finding the Fourth Proportional to 111,115.96, 153,340.96 and 65,203.06

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Solution

The fourth proportional to 111,115.96, 153,340.96 and 65,203.06 is: 89,980.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,115.96 : 153,340.96 = 65,203.06 : x
  2. Step 2: Convert to fraction form
    111,115.96/153,340.96 = 65,203.06/x
  3. Step 3: Cross multiply
    111,115.96x = 153,340.96 × 65,203.06
  4. Step 4: Simplify right side
    111,115.96x = 9,998,300,417.35
  5. Step 5: Solve for x
    x = 9,998,300,417.35/111,115.96
  6. Step 6: Final answer
    x = 89,980.77

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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.