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Finding the Fourth Proportional to 87,638.40, 131,457.60 and 73,814.40

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Solution

The fourth proportional to 87,638.40, 131,457.60 and 73,814.40 is: 110,721.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,638.40 : 131,457.60 = 73,814.40 : x
  2. Step 2: Convert to fraction form
    87,638.40/131,457.60 = 73,814.40/x
  3. Step 3: Cross multiply
    87,638.40x = 131,457.60 × 73,814.40
  4. Step 4: Simplify right side
    87,638.40x = 9,703,463,869.44
  5. Step 5: Solve for x
    x = 9,703,463,869.44/87,638.40
  6. Step 6: Final answer
    x = 110,721.60

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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.