Home / 128,440.80-192,416.40-69,256.80

Finding the Fourth Proportional to 128,440.80, 192,416.40 and 69,256.80

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Solution

The fourth proportional to 128,440.80, 192,416.40 and 69,256.80 is: 103,753.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,440.80 : 192,416.40 = 69,256.80 : x
  2. Step 2: Convert to fraction form
    128,440.80/192,416.40 = 69,256.80/x
  3. Step 3: Cross multiply
    128,440.80x = 192,416.40 × 69,256.80
  4. Step 4: Simplify right side
    128,440.80x = 13,326,144,131.52
  5. Step 5: Solve for x
    x = 13,326,144,131.52/128,440.80
  6. Step 6: Final answer
    x = 103,753.20

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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.