Home / 123,428.53-170,214.36-85,126.87

Finding the Fourth Proportional to 123,428.53, 170,214.36 and 85,126.87

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Solution

The fourth proportional to 123,428.53, 170,214.36 and 85,126.87 is: 117,394.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,428.53 : 170,214.36 = 85,126.87 : x
  2. Step 2: Convert to fraction form
    123,428.53/170,214.36 = 85,126.87/x
  3. Step 3: Cross multiply
    123,428.53x = 170,214.36 × 85,126.87
  4. Step 4: Simplify right side
    123,428.53x = 14,489,815,695.85
  5. Step 5: Solve for x
    x = 14,489,815,695.85/123,428.53
  6. Step 6: Final answer
    x = 117,394.38

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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.