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Finding the Fourth Proportional to 123,689.19, 170,603.09 and 113,513.09

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Solution

The fourth proportional to 123,689.19, 170,603.09 and 113,513.09 is: 156,567.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,689.19 : 170,603.09 = 113,513.09 : x
  2. Step 2: Convert to fraction form
    123,689.19/170,603.09 = 113,513.09/x
  3. Step 3: Cross multiply
    123,689.19x = 170,603.09 × 113,513.09
  4. Step 4: Simplify right side
    123,689.19x = 19,365,682,488.87
  5. Step 5: Solve for x
    x = 19,365,682,488.87/123,689.19
  6. Step 6: Final answer
    x = 156,567.30

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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.