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Finding the Fourth Proportional to 111,957.07, 154,507.79 and 61,656.07

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Solution

The fourth proportional to 111,957.07, 154,507.79 and 61,656.07 is: 85,089.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,957.07 : 154,507.79 = 61,656.07 : x
  2. Step 2: Convert to fraction form
    111,957.07/154,507.79 = 61,656.07/x
  3. Step 3: Cross multiply
    111,957.07x = 154,507.79 × 61,656.07
  4. Step 4: Simplify right side
    111,957.07x = 9,526,343,115.79
  5. Step 5: Solve for x
    x = 9,526,343,115.79/111,957.07
  6. Step 6: Final answer
    x = 85,089.25

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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.