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Finding the Fourth Proportional to 125,085.56, 187,392.90 and 61,831.64

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Solution

The fourth proportional to 125,085.56, 187,392.90 and 61,831.64 is: 92,631.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,085.56 : 187,392.90 = 61,831.64 : x
  2. Step 2: Convert to fraction form
    125,085.56/187,392.90 = 61,831.64/x
  3. Step 3: Cross multiply
    125,085.56x = 187,392.90 × 61,831.64
  4. Step 4: Simplify right side
    125,085.56x = 11,586,810,331.36
  5. Step 5: Solve for x
    x = 11,586,810,331.36/125,085.56
  6. Step 6: Final answer
    x = 92,631.08

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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.