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Finding the Fourth Proportional to 100,554.78, 138,830.58 and 62,354.90

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Solution

The fourth proportional to 100,554.78, 138,830.58 and 62,354.90 is: 86,090.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,554.78 : 138,830.58 = 62,354.90 : x
  2. Step 2: Convert to fraction form
    100,554.78/138,830.58 = 62,354.90/x
  3. Step 3: Cross multiply
    100,554.78x = 138,830.58 × 62,354.90
  4. Step 4: Simplify right side
    100,554.78x = 8,656,766,932.84
  5. Step 5: Solve for x
    x = 8,656,766,932.84/100,554.78
  6. Step 6: Final answer
    x = 86,090.06

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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.