Home / 78,869.53-118,304.55-19,705.21

Finding the Fourth Proportional to 78,869.53, 118,304.55 and 19,705.21

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Solution

The fourth proportional to 78,869.53, 118,304.55 and 19,705.21 is: 29,557.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,869.53 : 118,304.55 = 19,705.21 : x
  2. Step 2: Convert to fraction form
    78,869.53/118,304.55 = 19,705.21/x
  3. Step 3: Cross multiply
    78,869.53x = 118,304.55 × 19,705.21
  4. Step 4: Simplify right side
    78,869.53x = 2,331,215,705.94
  5. Step 5: Solve for x
    x = 2,331,215,705.94/78,869.53
  6. Step 6: Final answer
    x = 29,557.87

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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.