Home / 86,620.48-129,826.08-42,180.64

Finding the Fourth Proportional to 86,620.48, 129,826.08 and 42,180.64

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Solution

The fourth proportional to 86,620.48, 129,826.08 and 42,180.64 is: 63,220.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,620.48 : 129,826.08 = 42,180.64 : x
  2. Step 2: Convert to fraction form
    86,620.48/129,826.08 = 42,180.64/x
  3. Step 3: Cross multiply
    86,620.48x = 129,826.08 × 42,180.64
  4. Step 4: Simplify right side
    86,620.48x = 5,476,147,143.09
  5. Step 5: Solve for x
    x = 5,476,147,143.09/86,620.48
  6. Step 6: Final answer
    x = 63,220.00

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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.