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Finding the Fourth Proportional to 139,801.72, 192,927.36 and 76,138.24

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Solution

The fourth proportional to 139,801.72, 192,927.36 and 76,138.24 is: 105,071.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,801.72 : 192,927.36 = 76,138.24 : x
  2. Step 2: Convert to fraction form
    139,801.72/192,927.36 = 76,138.24/x
  3. Step 3: Cross multiply
    139,801.72x = 192,927.36 × 76,138.24
  4. Step 4: Simplify right side
    139,801.72x = 14,689,149,638.25
  5. Step 5: Solve for x
    x = 14,689,149,638.25/139,801.72
  6. Step 6: Final answer
    x = 105,071.31

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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.