Home / 100,020.42-137,806.65-65,968.83

Finding the Fourth Proportional to 100,020.42, 137,806.65 and 65,968.83

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Solution

The fourth proportional to 100,020.42, 137,806.65 and 65,968.83 is: 90,890.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,020.42 : 137,806.65 = 65,968.83 : x
  2. Step 2: Convert to fraction form
    100,020.42/137,806.65 = 65,968.83/x
  3. Step 3: Cross multiply
    100,020.42x = 137,806.65 × 65,968.83
  4. Step 4: Simplify right side
    100,020.42x = 9,090,943,466.72
  5. Step 5: Solve for x
    x = 9,090,943,466.72/100,020.42
  6. Step 6: Final answer
    x = 90,890.87

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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.