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Finding the Fourth Proportional to 70,990.56, 97,966.98 and 39,159.54

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Solution

The fourth proportional to 70,990.56, 97,966.98 and 39,159.54 is: 54,040.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,990.56 : 97,966.98 = 39,159.54 : x
  2. Step 2: Convert to fraction form
    70,990.56/97,966.98 = 39,159.54/x
  3. Step 3: Cross multiply
    70,990.56x = 97,966.98 × 39,159.54
  4. Step 4: Simplify right side
    70,990.56x = 3,836,341,871.99
  5. Step 5: Solve for x
    x = 3,836,341,871.99/70,990.56
  6. Step 6: Final answer
    x = 54,040.17

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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.