Home / 135,513.88-187,023-78,155.44

Finding the Fourth Proportional to 135,513.88, 187,023 and 78,155.44

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Solution

The fourth proportional to 135,513.88, 187,023 and 78,155.44 is: 107,862.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,513.88 : 187,023 = 78,155.44 : x
  2. Step 2: Convert to fraction form
    135,513.88/187,023 = 78,155.44/x
  3. Step 3: Cross multiply
    135,513.88x = 187,023 × 78,155.44
  4. Step 4: Simplify right side
    135,513.88x = 14,616,864,855.12
  5. Step 5: Solve for x
    x = 14,616,864,855.12/135,513.88
  6. Step 6: Final answer
    x = 107,862.49

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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.