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Finding the Fourth Proportional to 98,396.40, 147,578.76 and 28,259.76

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Solution

The fourth proportional to 98,396.40, 147,578.76 and 28,259.76 is: 42,385.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,396.40 : 147,578.76 = 28,259.76 : x
  2. Step 2: Convert to fraction form
    98,396.40/147,578.76 = 28,259.76/x
  3. Step 3: Cross multiply
    98,396.40x = 147,578.76 × 28,259.76
  4. Step 4: Simplify right side
    98,396.40x = 4,170,540,338.70
  5. Step 5: Solve for x
    x = 4,170,540,338.70/98,396.40
  6. Step 6: Final answer
    x = 42,385.09

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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.