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Finding the Fourth Proportional to 135,686.88, 187,125.40 and 84,704.32

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Solution

The fourth proportional to 135,686.88, 187,125.40 and 84,704.32 is: 116,815.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,686.88 : 187,125.40 = 84,704.32 : x
  2. Step 2: Convert to fraction form
    135,686.88/187,125.40 = 84,704.32/x
  3. Step 3: Cross multiply
    135,686.88x = 187,125.40 × 84,704.32
  4. Step 4: Simplify right side
    135,686.88x = 15,850,329,761.73
  5. Step 5: Solve for x
    x = 15,850,329,761.73/135,686.88
  6. Step 6: Final answer
    x = 116,815.49

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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.