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Finding the Fourth Proportional to 278,099.58, 417,189.33 and 85,988.98

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Solution

The fourth proportional to 278,099.58, 417,189.33 and 85,988.98 is: 128,995.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,099.58 : 417,189.33 = 85,988.98 : x
  2. Step 2: Convert to fraction form
    278,099.58/417,189.33 = 85,988.98/x
  3. Step 3: Cross multiply
    278,099.58x = 417,189.33 × 85,988.98
  4. Step 4: Simplify right side
    278,099.58x = 35,873,683,910.61
  5. Step 5: Solve for x
    x = 35,873,683,910.61/278,099.58
  6. Step 6: Final answer
    x = 128,995.82

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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.