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Finding the Fourth Proportional to 185,671.72, 256,155.20 and 105,080.76

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Solution

The fourth proportional to 185,671.72, 256,155.20 and 105,080.76 is: 144,970.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,671.72 : 256,155.20 = 105,080.76 : x
  2. Step 2: Convert to fraction form
    185,671.72/256,155.20 = 105,080.76/x
  3. Step 3: Cross multiply
    185,671.72x = 256,155.20 × 105,080.76
  4. Step 4: Simplify right side
    185,671.72x = 26,916,983,093.95
  5. Step 5: Solve for x
    x = 26,916,983,093.95/185,671.72
  6. Step 6: Final answer
    x = 144,970.83

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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.