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Finding the Fourth Proportional to 70,576.93, 105,869.51 and 19,971.71

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Solution

The fourth proportional to 70,576.93, 105,869.51 and 19,971.71 is: 29,958.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,576.93 : 105,869.51 = 19,971.71 : x
  2. Step 2: Convert to fraction form
    70,576.93/105,869.51 = 19,971.71/x
  3. Step 3: Cross multiply
    70,576.93x = 105,869.51 × 19,971.71
  4. Step 4: Simplify right side
    70,576.93x = 2,114,395,533.61
  5. Step 5: Solve for x
    x = 2,114,395,533.61/70,576.93
  6. Step 6: Final answer
    x = 29,958.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.