Home / 139,220.96-192,124.84-78,790.50

Finding the Fourth Proportional to 139,220.96, 192,124.84 and 78,790.50

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Solution

The fourth proportional to 139,220.96, 192,124.84 and 78,790.50 is: 108,730.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,220.96 : 192,124.84 = 78,790.50 : x
  2. Step 2: Convert to fraction form
    139,220.96/192,124.84 = 78,790.50/x
  3. Step 3: Cross multiply
    139,220.96x = 192,124.84 × 78,790.50
  4. Step 4: Simplify right side
    139,220.96x = 15,137,612,206.02
  5. Step 5: Solve for x
    x = 15,137,612,206.02/139,220.96
  6. Step 6: Final answer
    x = 108,730.84

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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.