Home / 85,579.40-128,126.10-80,924.60

Finding the Fourth Proportional to 85,579.40, 128,126.10 and 80,924.60

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Solution

The fourth proportional to 85,579.40, 128,126.10 and 80,924.60 is: 121,157.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,579.40 : 128,126.10 = 80,924.60 : x
  2. Step 2: Convert to fraction form
    85,579.40/128,126.10 = 80,924.60/x
  3. Step 3: Cross multiply
    85,579.40x = 128,126.10 × 80,924.60
  4. Step 4: Simplify right side
    85,579.40x = 10,368,553,392.06
  5. Step 5: Solve for x
    x = 10,368,553,392.06/85,579.40
  6. Step 6: Final answer
    x = 121,157.12

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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.