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Finding the Fourth Proportional to 124,561.40, 186,841.46 and 74,656.40

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Solution

The fourth proportional to 124,561.40, 186,841.46 and 74,656.40 is: 111,984.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,561.40 : 186,841.46 = 74,656.40 : x
  2. Step 2: Convert to fraction form
    124,561.40/186,841.46 = 74,656.40/x
  3. Step 3: Cross multiply
    124,561.40x = 186,841.46 × 74,656.40
  4. Step 4: Simplify right side
    124,561.40x = 13,948,910,774.34
  5. Step 5: Solve for x
    x = 13,948,910,774.34/124,561.40
  6. Step 6: Final answer
    x = 111,984.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.