Home / 185,520.61-256,019.09-100,638.28

Finding the Fourth Proportional to 185,520.61, 256,019.09 and 100,638.28

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Solution

The fourth proportional to 185,520.61, 256,019.09 and 100,638.28 is: 138,881.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,520.61 : 256,019.09 = 100,638.28 : x
  2. Step 2: Convert to fraction form
    185,520.61/256,019.09 = 100,638.28/x
  3. Step 3: Cross multiply
    185,520.61x = 256,019.09 × 100,638.28
  4. Step 4: Simplify right side
    185,520.61x = 25,765,320,864.77
  5. Step 5: Solve for x
    x = 25,765,320,864.77/185,520.61
  6. Step 6: Final answer
    x = 138,881.18

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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.