Home / 105,584.40-145,609.11-71,642.16

Finding the Fourth Proportional to 105,584.40, 145,609.11 and 71,642.16

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Solution

The fourth proportional to 105,584.40, 145,609.11 and 71,642.16 is: 98,800.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,584.40 : 145,609.11 = 71,642.16 : x
  2. Step 2: Convert to fraction form
    105,584.40/145,609.11 = 71,642.16/x
  3. Step 3: Cross multiply
    105,584.40x = 145,609.11 × 71,642.16
  4. Step 4: Simplify right side
    105,584.40x = 10,431,751,156.08
  5. Step 5: Solve for x
    x = 10,431,751,156.08/105,584.40
  6. Step 6: Final answer
    x = 98,800.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.