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Finding the Fourth Proportional to 185,490.63, 278,203.64 and 85,642.31

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Solution

The fourth proportional to 185,490.63, 278,203.64 and 85,642.31 is: 128,448.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,490.63 : 278,203.64 = 85,642.31 : x
  2. Step 2: Convert to fraction form
    185,490.63/278,203.64 = 85,642.31/x
  3. Step 3: Cross multiply
    185,490.63x = 278,203.64 × 85,642.31
  4. Step 4: Simplify right side
    185,490.63x = 23,826,002,380.01
  5. Step 5: Solve for x
    x = 23,826,002,380.01/185,490.63
  6. Step 6: Final answer
    x = 128,448.55

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1.5x scale

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.