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Finding the Fourth Proportional to 185,631.79, 256,172 and 100,748.86

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Solution

The fourth proportional to 185,631.79, 256,172 and 100,748.86 is: 139,033.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,631.79 : 256,172 = 100,748.86 : x
  2. Step 2: Convert to fraction form
    185,631.79/256,172 = 100,748.86/x
  3. Step 3: Cross multiply
    185,631.79x = 256,172 × 100,748.86
  4. Step 4: Simplify right side
    185,631.79x = 25,809,036,963.92
  5. Step 5: Solve for x
    x = 25,809,036,963.92/185,631.79
  6. Step 6: Final answer
    x = 139,033.50

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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.