Home / 129,152.80-178,230.72-71,790.36

Finding the Fourth Proportional to 129,152.80, 178,230.72 and 71,790.36

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Solution

The fourth proportional to 129,152.80, 178,230.72 and 71,790.36 is: 99,070.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,152.80 : 178,230.72 = 71,790.36 : x
  2. Step 2: Convert to fraction form
    129,152.80/178,230.72 = 71,790.36/x
  3. Step 3: Cross multiply
    129,152.80x = 178,230.72 × 71,790.36
  4. Step 4: Simplify right side
    129,152.80x = 12,795,247,551.86
  5. Step 5: Solve for x
    x = 12,795,247,551.86/129,152.80
  6. Step 6: Final answer
    x = 99,070.62

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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.