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Finding the Fourth Proportional to 70,201.59, 96,878.16 and 39,989.70

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Solution

The fourth proportional to 70,201.59, 96,878.16 and 39,989.70 is: 55,185.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,201.59 : 96,878.16 = 39,989.70 : x
  2. Step 2: Convert to fraction form
    70,201.59/96,878.16 = 39,989.70/x
  3. Step 3: Cross multiply
    70,201.59x = 96,878.16 × 39,989.70
  4. Step 4: Simplify right side
    70,201.59x = 3,874,128,554.95
  5. Step 5: Solve for x
    x = 3,874,128,554.95/70,201.59
  6. Step 6: Final answer
    x = 55,185.77

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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.