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Finding the Fourth Proportional to 70,201.79, 96,878.33 and 39,987.10

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Solution

The fourth proportional to 70,201.79, 96,878.33 and 39,987.10 is: 55,182.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,201.79 : 96,878.33 = 39,987.10 : x
  2. Step 2: Convert to fraction form
    70,201.79/96,878.33 = 39,987.10/x
  3. Step 3: Cross multiply
    70,201.79x = 96,878.33 × 39,987.10
  4. Step 4: Simplify right side
    70,201.79x = 3,873,883,540.66
  5. Step 5: Solve for x
    x = 3,873,883,540.66/70,201.79
  6. Step 6: Final answer
    x = 55,182.12

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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.