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Finding the Fourth Proportional to 103,538.70, 155,308.05 and 100,622.70

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Solution

The fourth proportional to 103,538.70, 155,308.05 and 100,622.70 is: 150,934.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,538.70 : 155,308.05 = 100,622.70 : x
  2. Step 2: Convert to fraction form
    103,538.70/155,308.05 = 100,622.70/x
  3. Step 3: Cross multiply
    103,538.70x = 155,308.05 × 100,622.70
  4. Step 4: Simplify right side
    103,538.70x = 15,627,515,322.74
  5. Step 5: Solve for x
    x = 15,627,515,322.74/103,538.70
  6. Step 6: Final answer
    x = 150,934.05

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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.