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Finding the Fourth Proportional to 70,990.44, 97,966.90 and 40,781.60

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Solution

The fourth proportional to 70,990.44, 97,966.90 and 40,781.60 is: 56,278.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,990.44 : 97,966.90 = 40,781.60 : x
  2. Step 2: Convert to fraction form
    70,990.44/97,966.90 = 40,781.60/x
  3. Step 3: Cross multiply
    70,990.44x = 97,966.90 × 40,781.60
  4. Step 4: Simplify right side
    70,990.44x = 3,995,246,929.04
  5. Step 5: Solve for x
    x = 3,995,246,929.04/70,990.44
  6. Step 6: Final answer
    x = 56,278.66

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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.