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Finding the Fourth Proportional to 139,624, 192,683.08 and 75,961.76

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Solution

The fourth proportional to 139,624, 192,683.08 and 75,961.76 is: 104,828.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,624 : 192,683.08 = 75,961.76 : x
  2. Step 2: Convert to fraction form
    139,624/192,683.08 = 75,961.76/x
  3. Step 3: Cross multiply
    139,624x = 192,683.08 × 75,961.76
  4. Step 4: Simplify right side
    139,624x = 14,636,545,879.02
  5. Step 5: Solve for x
    x = 14,636,545,879.02/139,624
  6. Step 6: Final answer
    x = 104,828.30

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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.