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Finding the Fourth Proportional to 100,890.70, 151,336.05 and 90,004.30

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Solution

The fourth proportional to 100,890.70, 151,336.05 and 90,004.30 is: 135,006.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,890.70 : 151,336.05 = 90,004.30 : x
  2. Step 2: Convert to fraction form
    100,890.70/151,336.05 = 90,004.30/x
  3. Step 3: Cross multiply
    100,890.70x = 151,336.05 × 90,004.30
  4. Step 4: Simplify right side
    100,890.70x = 13,620,895,245.02
  5. Step 5: Solve for x
    x = 13,620,895,245.02/100,890.70
  6. Step 6: Final answer
    x = 135,006.45

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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.