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Finding the Fourth Proportional to 123,703.74, 170,710.47 and 67,113.90

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Solution

The fourth proportional to 123,703.74, 170,710.47 and 67,113.90 is: 92,616.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,703.74 : 170,710.47 = 67,113.90 : x
  2. Step 2: Convert to fraction form
    123,703.74/170,710.47 = 67,113.90/x
  3. Step 3: Cross multiply
    123,703.74x = 170,710.47 × 67,113.90
  4. Step 4: Simplify right side
    123,703.74x = 11,457,045,412.53
  5. Step 5: Solve for x
    x = 11,457,045,412.53/123,703.74
  6. Step 6: Final answer
    x = 92,616.81

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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.