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Finding the Fourth Proportional to 124,707.57, 172,100.70 and 68,122.59

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Solution

The fourth proportional to 124,707.57, 172,100.70 and 68,122.59 is: 94,011.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,707.57 : 172,100.70 = 68,122.59 : x
  2. Step 2: Convert to fraction form
    124,707.57/172,100.70 = 68,122.59/x
  3. Step 3: Cross multiply
    124,707.57x = 172,100.70 × 68,122.59
  4. Step 4: Simplify right side
    124,707.57x = 11,723,945,424.81
  5. Step 5: Solve for x
    x = 11,723,945,424.81/124,707.57
  6. Step 6: Final answer
    x = 94,011.50

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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.