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Finding the Fourth Proportional to 135,698.21, 187,285.95 and 75,288.29

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Solution

The fourth proportional to 135,698.21, 187,285.95 and 75,288.29 is: 103,910.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,698.21 : 187,285.95 = 75,288.29 : x
  2. Step 2: Convert to fraction form
    135,698.21/187,285.95 = 75,288.29/x
  3. Step 3: Cross multiply
    135,698.21x = 187,285.95 × 75,288.29
  4. Step 4: Simplify right side
    135,698.21x = 14,100,438,916.53
  5. Step 5: Solve for x
    x = 14,100,438,916.53/135,698.21
  6. Step 6: Final answer
    x = 103,910.28

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1.5x scale

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.