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Finding the Fourth Proportional to 154,989.98, 213,893.26 and 86,079.72

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Solution

The fourth proportional to 154,989.98, 213,893.26 and 86,079.72 is: 118,793.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,989.98 : 213,893.26 = 86,079.72 : x
  2. Step 2: Convert to fraction form
    154,989.98/213,893.26 = 86,079.72/x
  3. Step 3: Cross multiply
    154,989.98x = 213,893.26 × 86,079.72
  4. Step 4: Simplify right side
    154,989.98x = 18,411,871,930.69
  5. Step 5: Solve for x
    x = 18,411,871,930.69/154,989.98
  6. Step 6: Final answer
    x = 118,793.95

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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.