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Finding the Fourth Proportional to 113,658.78, 156,916.32 and 101,048.64

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Solution

The fourth proportional to 113,658.78, 156,916.32 and 101,048.64 is: 139,506.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,658.78 : 156,916.32 = 101,048.64 : x
  2. Step 2: Convert to fraction form
    113,658.78/156,916.32 = 101,048.64/x
  3. Step 3: Cross multiply
    113,658.78x = 156,916.32 × 101,048.64
  4. Step 4: Simplify right side
    113,658.78x = 15,856,180,729.80
  5. Step 5: Solve for x
    x = 15,856,180,729.80/113,658.78
  6. Step 6: Final answer
    x = 139,506.87

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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.