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Finding the Fourth Proportional to 82,988.72, 124,490.10 and 36,274.40

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Solution

The fourth proportional to 82,988.72, 124,490.10 and 36,274.40 is: 54,414.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,988.72 : 124,490.10 = 36,274.40 : x
  2. Step 2: Convert to fraction form
    82,988.72/124,490.10 = 36,274.40/x
  3. Step 3: Cross multiply
    82,988.72x = 124,490.10 × 36,274.40
  4. Step 4: Simplify right side
    82,988.72x = 4,515,803,683.44
  5. Step 5: Solve for x
    x = 4,515,803,683.44/82,988.72
  6. Step 6: Final answer
    x = 54,414.67

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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.