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Finding the Fourth Proportional to 154,897.48, 213,755.16 and 86,913.28

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Solution

The fourth proportional to 154,897.48, 213,755.16 and 86,913.28 is: 119,938.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,897.48 : 213,755.16 = 86,913.28 : x
  2. Step 2: Convert to fraction form
    154,897.48/213,755.16 = 86,913.28/x
  3. Step 3: Cross multiply
    154,897.48x = 213,755.16 × 86,913.28
  4. Step 4: Simplify right side
    154,897.48x = 18,578,162,072.52
  5. Step 5: Solve for x
    x = 18,578,162,072.52/154,897.48
  6. Step 6: Final answer
    x = 119,938.44

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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.