Home / 105,890.12-158,900.96-65,987.40

Finding the Fourth Proportional to 105,890.12, 158,900.96 and 65,987.40

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Solution

The fourth proportional to 105,890.12, 158,900.96 and 65,987.40 is: 99,022.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,890.12 : 158,900.96 = 65,987.40 : x
  2. Step 2: Convert to fraction form
    105,890.12/158,900.96 = 65,987.40/x
  3. Step 3: Cross multiply
    105,890.12x = 158,900.96 × 65,987.40
  4. Step 4: Simplify right side
    105,890.12x = 10,485,461,207.90
  5. Step 5: Solve for x
    x = 10,485,461,207.90/105,890.12
  6. Step 6: Final answer
    x = 99,022.09

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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.