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Finding the Fourth Proportional to 103,611.51, 155,417.27 and 68,542.97

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Solution

The fourth proportional to 103,611.51, 155,417.27 and 68,542.97 is: 102,814.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,611.51 : 155,417.27 = 68,542.97 : x
  2. Step 2: Convert to fraction form
    103,611.51/155,417.27 = 68,542.97/x
  3. Step 3: Cross multiply
    103,611.51x = 155,417.27 × 68,542.97
  4. Step 4: Simplify right side
    103,611.51x = 10,652,760,155.29
  5. Step 5: Solve for x
    x = 10,652,760,155.29/103,611.51
  6. Step 6: Final answer
    x = 102,814.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.