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Finding the Fourth Proportional to 111,299.42, 153,565.65 and 65,988.02

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Solution

The fourth proportional to 111,299.42, 153,565.65 and 65,988.02 is: 91,047.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,299.42 : 153,565.65 = 65,988.02 : x
  2. Step 2: Convert to fraction form
    111,299.42/153,565.65 = 65,988.02/x
  3. Step 3: Cross multiply
    111,299.42x = 153,565.65 × 65,988.02
  4. Step 4: Simplify right side
    111,299.42x = 10,133,493,183.51
  5. Step 5: Solve for x
    x = 10,133,493,183.51/111,299.42
  6. Step 6: Final answer
    x = 91,047.13

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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.