Home / 85,410.06-128,115.09-43,283.58

Finding the Fourth Proportional to 85,410.06, 128,115.09 and 43,283.58

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Solution

The fourth proportional to 85,410.06, 128,115.09 and 43,283.58 is: 64,925.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,410.06 : 128,115.09 = 43,283.58 : x
  2. Step 2: Convert to fraction form
    85,410.06/128,115.09 = 43,283.58/x
  3. Step 3: Cross multiply
    85,410.06x = 128,115.09 × 43,283.58
  4. Step 4: Simplify right side
    85,410.06x = 5,545,279,747.22
  5. Step 5: Solve for x
    x = 5,545,279,747.22/85,410.06
  6. Step 6: Final answer
    x = 64,925.37

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Double scale
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Similar ratio
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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.