Home / 128,210.68-192,149.58-52,220.60

Finding the Fourth Proportional to 128,210.68, 192,149.58 and 52,220.60

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Solution

The fourth proportional to 128,210.68, 192,149.58 and 52,220.60 is: 78,263.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,210.68 : 192,149.58 = 52,220.60 : x
  2. Step 2: Convert to fraction form
    128,210.68/192,149.58 = 52,220.60/x
  3. Step 3: Cross multiply
    128,210.68x = 192,149.58 × 52,220.60
  4. Step 4: Simplify right side
    128,210.68x = 10,034,166,312.99
  5. Step 5: Solve for x
    x = 10,034,166,312.99/128,210.68
  6. Step 6: Final answer
    x = 78,263.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.