Home / 78,871.04-118,306.80-19,706.72

Finding the Fourth Proportional to 78,871.04, 118,306.80 and 19,706.72

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Solution

The fourth proportional to 78,871.04, 118,306.80 and 19,706.72 is: 29,560.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,871.04 : 118,306.80 = 19,706.72 : x
  2. Step 2: Convert to fraction form
    78,871.04/118,306.80 = 19,706.72/x
  3. Step 3: Cross multiply
    78,871.04x = 118,306.80 × 19,706.72
  4. Step 4: Simplify right side
    78,871.04x = 2,331,438,390.16
  5. Step 5: Solve for x
    x = 2,331,438,390.16/78,871.04
  6. Step 6: Final answer
    x = 29,560.13

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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.