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Finding the Fourth Proportional to 98,603.40, 147,905.10 and 28,489.80

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Solution

The fourth proportional to 98,603.40, 147,905.10 and 28,489.80 is: 42,734.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,603.40 : 147,905.10 = 28,489.80 : x
  2. Step 2: Convert to fraction form
    98,603.40/147,905.10 = 28,489.80/x
  3. Step 3: Cross multiply
    98,603.40x = 147,905.10 × 28,489.80
  4. Step 4: Simplify right side
    98,603.40x = 4,213,786,717.98
  5. Step 5: Solve for x
    x = 4,213,786,717.98/98,603.40
  6. Step 6: Final answer
    x = 42,734.70

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Similar ratio
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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.