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Finding the Fourth Proportional to 185,657.76, 256,213.08 and 100,780.20

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Solution

The fourth proportional to 185,657.76, 256,213.08 and 100,780.20 is: 139,079.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,657.76 : 256,213.08 = 100,780.20 : x
  2. Step 2: Convert to fraction form
    185,657.76/256,213.08 = 100,780.20/x
  3. Step 3: Cross multiply
    185,657.76x = 256,213.08 × 100,780.20
  4. Step 4: Simplify right side
    185,657.76x = 25,821,205,445.02
  5. Step 5: Solve for x
    x = 25,821,205,445.02/185,657.76
  6. Step 6: Final answer
    x = 139,079.59

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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.