Home / 85,548.57-128,355.75-60,272.43

Finding the Fourth Proportional to 85,548.57, 128,355.75 and 60,272.43

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Solution

The fourth proportional to 85,548.57, 128,355.75 and 60,272.43 is: 90,431.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,548.57 : 128,355.75 = 60,272.43 : x
  2. Step 2: Convert to fraction form
    85,548.57/128,355.75 = 60,272.43/x
  3. Step 3: Cross multiply
    85,548.57x = 128,355.75 × 60,272.43
  4. Step 4: Simplify right side
    85,548.57x = 7,736,312,956.97
  5. Step 5: Solve for x
    x = 7,736,312,956.97/85,548.57
  6. Step 6: Final answer
    x = 90,431.82

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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.