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Finding the Fourth Proportional to 111,564.93, 153,937.95 and 66,257.12

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Solution

The fourth proportional to 111,564.93, 153,937.95 and 66,257.12 is: 91,421.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,564.93 : 153,937.95 = 66,257.12 : x
  2. Step 2: Convert to fraction form
    111,564.93/153,937.95 = 66,257.12/x
  3. Step 3: Cross multiply
    111,564.93x = 153,937.95 × 66,257.12
  4. Step 4: Simplify right side
    111,564.93x = 10,199,485,060.67
  5. Step 5: Solve for x
    x = 10,199,485,060.67/111,564.93
  6. Step 6: Final answer
    x = 91,421.97

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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.