Home / 128,020.40-192,030.60-120,762.80

Finding the Fourth Proportional to 128,020.40, 192,030.60 and 120,762.80

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Solution

The fourth proportional to 128,020.40, 192,030.60 and 120,762.80 is: 181,144.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,020.40 : 192,030.60 = 120,762.80 : x
  2. Step 2: Convert to fraction form
    128,020.40/192,030.60 = 120,762.80/x
  3. Step 3: Cross multiply
    128,020.40x = 192,030.60 × 120,762.80
  4. Step 4: Simplify right side
    128,020.40x = 23,190,152,941.68
  5. Step 5: Solve for x
    x = 23,190,152,941.68/128,020.40
  6. Step 6: Final answer
    x = 181,144.20

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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.