Home / 85,984.13-128,888.69-79,619.96

Finding the Fourth Proportional to 85,984.13, 128,888.69 and 79,619.96

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Solution

The fourth proportional to 85,984.13, 128,888.69 and 79,619.96 is: 119,348.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,984.13 : 128,888.69 = 79,619.96 : x
  2. Step 2: Convert to fraction form
    85,984.13/128,888.69 = 79,619.96/x
  3. Step 3: Cross multiply
    85,984.13x = 128,888.69 × 79,619.96
  4. Step 4: Simplify right side
    85,984.13x = 10,262,111,299.71
  5. Step 5: Solve for x
    x = 10,262,111,299.71/85,984.13
  6. Step 6: Final answer
    x = 119,348.91

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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.