Home / 258,791,148.72-388,056,915.72-86,207,286.96

Finding the Fourth Proportional to 258,791,148.72, 388,056,915.72 and 86,207,286.96

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Solution

The fourth proportional to 258,791,148.72, 388,056,915.72 and 86,207,286.96 is: 129,267,689.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,791,148.72 : 388,056,915.72 = 86,207,286.96 : x
  2. Step 2: Convert to fraction form
    258,791,148.72/388,056,915.72 = 86,207,286.96/x
  3. Step 3: Cross multiply
    258,791,148.72x = 388,056,915.72 × 86,207,286.96
  4. Step 4: Simplify right side
    258,791,148.72x = 33,453,333,890,286,576
  5. Step 5: Solve for x
    x = 33,453,333,890,286,576/258,791,148.72
  6. Step 6: Final answer
    x = 129,267,689.62

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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.