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Finding the Fourth Proportional to 124,898.72, 172,361.60 and 68,308.88

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Solution

The fourth proportional to 124,898.72, 172,361.60 and 68,308.88 is: 94,267.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,898.72 : 172,361.60 = 68,308.88 : x
  2. Step 2: Convert to fraction form
    124,898.72/172,361.60 = 68,308.88/x
  3. Step 3: Cross multiply
    124,898.72x = 172,361.60 × 68,308.88
  4. Step 4: Simplify right side
    124,898.72x = 11,773,826,647.66
  5. Step 5: Solve for x
    x = 11,773,826,647.66/124,898.72
  6. Step 6: Final answer
    x = 94,267.00

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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.