Home / 123,578.40-170,543.88-69,865.68

Finding the Fourth Proportional to 123,578.40, 170,543.88 and 69,865.68

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Solution

The fourth proportional to 123,578.40, 170,543.88 and 69,865.68 is: 96,417.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,578.40 : 170,543.88 = 69,865.68 : x
  2. Step 2: Convert to fraction form
    123,578.40/170,543.88 = 69,865.68/x
  3. Step 3: Cross multiply
    123,578.40x = 170,543.88 × 69,865.68
  4. Step 4: Simplify right side
    123,578.40x = 11,915,164,146.04
  5. Step 5: Solve for x
    x = 11,915,164,146.04/123,578.40
  6. Step 6: Final answer
    x = 96,417.85

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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.