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Finding the Fourth Proportional to 111,418.32, 153,707.47 and 66,098.21

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Solution

The fourth proportional to 111,418.32, 153,707.47 and 66,098.21 is: 91,185.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,418.32 : 153,707.47 = 66,098.21 : x
  2. Step 2: Convert to fraction form
    111,418.32/153,707.47 = 66,098.21/x
  3. Step 3: Cross multiply
    111,418.32x = 153,707.47 × 66,098.21
  4. Step 4: Simplify right side
    111,418.32x = 10,159,788,849.65
  5. Step 5: Solve for x
    x = 10,159,788,849.65/111,418.32
  6. Step 6: Final answer
    x = 91,185.98

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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.