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Finding the Fourth Proportional to 60,490.80, 90,631.98 and 47,190.06

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Solution

The fourth proportional to 60,490.80, 90,631.98 and 47,190.06 is: 70,703.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,490.80 : 90,631.98 = 47,190.06 : x
  2. Step 2: Convert to fraction form
    60,490.80/90,631.98 = 47,190.06/x
  3. Step 3: Cross multiply
    60,490.80x = 90,631.98 × 47,190.06
  4. Step 4: Simplify right side
    60,490.80x = 4,276,928,574.12
  5. Step 5: Solve for x
    x = 4,276,928,574.12/60,490.80
  6. Step 6: Final answer
    x = 70,703.79

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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.