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Finding the Fourth Proportional to 124,735.68, 172,134.72 and 68,148

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Solution

The fourth proportional to 124,735.68, 172,134.72 and 68,148 is: 94,043.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,735.68 : 172,134.72 = 68,148 : x
  2. Step 2: Convert to fraction form
    124,735.68/172,134.72 = 68,148/x
  3. Step 3: Cross multiply
    124,735.68x = 172,134.72 × 68,148
  4. Step 4: Simplify right side
    124,735.68x = 11,730,636,898.56
  5. Step 5: Solve for x
    x = 11,730,636,898.56/124,735.68
  6. Step 6: Final answer
    x = 94,043.96

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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.