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Finding the Fourth Proportional to 61,878.21, 85,393.89 and 35,020.23

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Solution

The fourth proportional to 61,878.21, 85,393.89 and 35,020.23 is: 48,329.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,878.21 : 85,393.89 = 35,020.23 : x
  2. Step 2: Convert to fraction form
    61,878.21/85,393.89 = 35,020.23/x
  3. Step 3: Cross multiply
    61,878.21x = 85,393.89 × 35,020.23
  4. Step 4: Simplify right side
    61,878.21x = 2,990,513,668.39
  5. Step 5: Solve for x
    x = 2,990,513,668.39/61,878.21
  6. Step 6: Final answer
    x = 48,329.03

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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.