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Finding the Fourth Proportional to 139,778.73, 192,888.54 and 76,116.92

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Solution

The fourth proportional to 139,778.73, 192,888.54 and 76,116.92 is: 105,038.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,778.73 : 192,888.54 = 76,116.92 : x
  2. Step 2: Convert to fraction form
    139,778.73/192,888.54 = 76,116.92/x
  3. Step 3: Cross multiply
    139,778.73x = 192,888.54 × 76,116.92
  4. Step 4: Simplify right side
    139,778.73x = 14,682,080,603.65
  5. Step 5: Solve for x
    x = 14,682,080,603.65/139,778.73
  6. Step 6: Final answer
    x = 105,038.02

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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.