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Finding the Fourth Proportional to 70,990.97, 97,967.07 and 39,159.18

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Solution

The fourth proportional to 70,990.97, 97,967.07 and 39,159.18 is: 54,039.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,990.97 : 97,967.07 = 39,159.18 : x
  2. Step 2: Convert to fraction form
    70,990.97/97,967.07 = 39,159.18/x
  3. Step 3: Cross multiply
    70,990.97x = 97,967.07 × 39,159.18
  4. Step 4: Simplify right side
    70,990.97x = 3,836,310,128.20
  5. Step 5: Solve for x
    x = 3,836,310,128.20/70,990.97
  6. Step 6: Final answer
    x = 54,039.41

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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.