Home / 85,645.12-128,329.44-52,744

Finding the Fourth Proportional to 85,645.12, 128,329.44 and 52,744

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Solution

The fourth proportional to 85,645.12, 128,329.44 and 52,744 is: 79,030.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,645.12 : 128,329.44 = 52,744 : x
  2. Step 2: Convert to fraction form
    85,645.12/128,329.44 = 52,744/x
  3. Step 3: Cross multiply
    85,645.12x = 128,329.44 × 52,744
  4. Step 4: Simplify right side
    85,645.12x = 6,768,607,983.36
  5. Step 5: Solve for x
    x = 6,768,607,983.36/85,645.12
  6. Step 6: Final answer
    x = 79,030.87

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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.