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Finding the Fourth Proportional to 90,998.40, 136,432.80 and 34,816.80

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Solution

The fourth proportional to 90,998.40, 136,432.80 and 34,816.80 is: 52,200.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,998.40 : 136,432.80 = 34,816.80 : x
  2. Step 2: Convert to fraction form
    90,998.40/136,432.80 = 34,816.80/x
  3. Step 3: Cross multiply
    90,998.40x = 136,432.80 × 34,816.80
  4. Step 4: Simplify right side
    90,998.40x = 4,750,153,511.04
  5. Step 5: Solve for x
    x = 4,750,153,511.04/90,998.40
  6. Step 6: Final answer
    x = 52,200.41

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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.