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Finding the Fourth Proportional to 8,319,092.80, 12,480,388.80 and 4,721,915.20

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Solution

The fourth proportional to 8,319,092.80, 12,480,388.80 and 4,721,915.20 is: 7,083,865.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,319,092.80 : 12,480,388.80 = 4,721,915.20 : x
  2. Step 2: Convert to fraction form
    8,319,092.80/12,480,388.80 = 4,721,915.20/x
  3. Step 3: Cross multiply
    8,319,092.80x = 12,480,388.80 × 4,721,915.20
  4. Step 4: Simplify right side
    8,319,092.80x = 58,931,337,576,629.77
  5. Step 5: Solve for x
    x = 58,931,337,576,629.77/8,319,092.80
  6. Step 6: Final answer
    x = 7,083,865.87

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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.