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Finding the Fourth Proportional to 278,093.17, 416,818.45 and 128,018.80

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Solution

The fourth proportional to 278,093.17, 416,818.45 and 128,018.80 is: 191,880.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,093.17 : 416,818.45 = 128,018.80 : x
  2. Step 2: Convert to fraction form
    278,093.17/416,818.45 = 128,018.80/x
  3. Step 3: Cross multiply
    278,093.17x = 416,818.45 × 128,018.80
  4. Step 4: Simplify right side
    278,093.17x = 53,360,595,062.67
  5. Step 5: Solve for x
    x = 53,360,595,062.67/278,093.17
  6. Step 6: Final answer
    x = 191,880.28

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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.