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Finding the Fourth Proportional to 185,686.81, 256,247.78 and 100,803.87

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Solution

The fourth proportional to 185,686.81, 256,247.78 and 100,803.87 is: 139,109.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,686.81 : 256,247.78 = 100,803.87 : x
  2. Step 2: Convert to fraction form
    185,686.81/256,247.78 = 100,803.87/x
  3. Step 3: Cross multiply
    185,686.81x = 256,247.78 × 100,803.87
  4. Step 4: Simplify right side
    185,686.81x = 25,830,767,902.91
  5. Step 5: Solve for x
    x = 25,830,767,902.91/185,686.81
  6. Step 6: Final answer
    x = 139,109.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.