Home / 103,211.80-142,433.76-77,324.48

Finding the Fourth Proportional to 103,211.80, 142,433.76 and 77,324.48

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Solution

The fourth proportional to 103,211.80, 142,433.76 and 77,324.48 is: 106,708.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,211.80 : 142,433.76 = 77,324.48 : x
  2. Step 2: Convert to fraction form
    103,211.80/142,433.76 = 77,324.48/x
  3. Step 3: Cross multiply
    103,211.80x = 142,433.76 × 77,324.48
  4. Step 4: Simplify right side
    103,211.80x = 11,013,616,426.44
  5. Step 5: Solve for x
    x = 11,013,616,426.44/103,211.80
  6. Step 6: Final answer
    x = 106,708.89

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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.