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Finding the Fourth Proportional to 70,994.32, 97,968.20 and 39,156.88

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Solution

The fourth proportional to 70,994.32, 97,968.20 and 39,156.88 is: 54,034.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,994.32 : 97,968.20 = 39,156.88 : x
  2. Step 2: Convert to fraction form
    70,994.32/97,968.20 = 39,156.88/x
  3. Step 3: Cross multiply
    70,994.32x = 97,968.20 × 39,156.88
  4. Step 4: Simplify right side
    70,994.32x = 3,836,129,051.22
  5. Step 5: Solve for x
    x = 3,836,129,051.22/70,994.32
  6. Step 6: Final answer
    x = 54,034.31

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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.