Home / 87,995.12-120,983.60-78,343.16

Finding the Fourth Proportional to 87,995.12, 120,983.60 and 78,343.16

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Solution

The fourth proportional to 87,995.12, 120,983.60 and 78,343.16 is: 107,713.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,995.12 : 120,983.60 = 78,343.16 : x
  2. Step 2: Convert to fraction form
    87,995.12/120,983.60 = 78,343.16/x
  3. Step 3: Cross multiply
    87,995.12x = 120,983.60 × 78,343.16
  4. Step 4: Simplify right side
    87,995.12x = 9,478,237,532.18
  5. Step 5: Solve for x
    x = 9,478,237,532.18/87,995.12
  6. Step 6: Final answer
    x = 107,713.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.