Home / 103,268.25-142,396.35-71,381.79

Finding the Fourth Proportional to 103,268.25, 142,396.35 and 71,381.79

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Solution

The fourth proportional to 103,268.25, 142,396.35 and 71,381.79 is: 98,428.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,268.25 : 142,396.35 = 71,381.79 : x
  2. Step 2: Convert to fraction form
    103,268.25/142,396.35 = 71,381.79/x
  3. Step 3: Cross multiply
    103,268.25x = 142,396.35 × 71,381.79
  4. Step 4: Simplify right side
    103,268.25x = 10,164,506,352.47
  5. Step 5: Solve for x
    x = 10,164,506,352.47/103,268.25
  6. Step 6: Final answer
    x = 98,428.18

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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.