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Finding the Fourth Proportional to 101,520.70, 140,051.64 and 65,722.30

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Solution

The fourth proportional to 101,520.70, 140,051.64 and 65,722.30 is: 90,666.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,520.70 : 140,051.64 = 65,722.30 : x
  2. Step 2: Convert to fraction form
    101,520.70/140,051.64 = 65,722.30/x
  3. Step 3: Cross multiply
    101,520.70x = 140,051.64 × 65,722.30
  4. Step 4: Simplify right side
    101,520.70x = 9,204,515,899.57
  5. Step 5: Solve for x
    x = 9,204,515,899.57/101,520.70
  6. Step 6: Final answer
    x = 90,666.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.