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Finding the Fourth Proportional to 104,291.75, 156,063.92 and 90,300.05

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Solution

The fourth proportional to 104,291.75, 156,063.92 and 90,300.05 is: 135,126.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,291.75 : 156,063.92 = 90,300.05 : x
  2. Step 2: Convert to fraction form
    104,291.75/156,063.92 = 90,300.05/x
  3. Step 3: Cross multiply
    104,291.75x = 156,063.92 × 90,300.05
  4. Step 4: Simplify right side
    104,291.75x = 14,092,579,132.62
  5. Step 5: Solve for x
    x = 14,092,579,132.62/104,291.75
  6. Step 6: Final answer
    x = 135,126.50

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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.