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Finding the Fourth Proportional to 59,679.40, 89,547.90 and 42,111.40

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Solution

The fourth proportional to 59,679.40, 89,547.90 and 42,111.40 is: 63,187.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,679.40 : 89,547.90 = 42,111.40 : x
  2. Step 2: Convert to fraction form
    59,679.40/89,547.90 = 42,111.40/x
  3. Step 3: Cross multiply
    59,679.40x = 89,547.90 × 42,111.40
  4. Step 4: Simplify right side
    59,679.40x = 3,770,987,436.06
  5. Step 5: Solve for x
    x = 3,770,987,436.06/59,679.40
  6. Step 6: Final answer
    x = 63,187.42

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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.