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Finding the Fourth Proportional to 48,937.40, 73,211.70 and 42,435.80

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Solution

The fourth proportional to 48,937.40, 73,211.70 and 42,435.80 is: 63,485.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,937.40 : 73,211.70 = 42,435.80 : x
  2. Step 2: Convert to fraction form
    48,937.40/73,211.70 = 42,435.80/x
  3. Step 3: Cross multiply
    48,937.40x = 73,211.70 × 42,435.80
  4. Step 4: Simplify right side
    48,937.40x = 3,106,797,058.86
  5. Step 5: Solve for x
    x = 3,106,797,058.86/48,937.40
  6. Step 6: Final answer
    x = 63,485.13

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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.