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Finding the Fourth Proportional to 90,663.68, 135,975 and 34,483.84

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Solution

The fourth proportional to 90,663.68, 135,975 and 34,483.84 is: 51,717.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,663.68 : 135,975 = 34,483.84 : x
  2. Step 2: Convert to fraction form
    90,663.68/135,975 = 34,483.84/x
  3. Step 3: Cross multiply
    90,663.68x = 135,975 × 34,483.84
  4. Step 4: Simplify right side
    90,663.68x = 4,688,940,144
  5. Step 5: Solve for x
    x = 4,688,940,144/90,663.68
  6. Step 6: Final answer
    x = 51,717.96

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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.