Home / 128,128.41-192,210.98-39,389.36

Finding the Fourth Proportional to 128,128.41, 192,210.98 and 39,389.36

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Solution

The fourth proportional to 128,128.41, 192,210.98 and 39,389.36 is: 59,089.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,128.41 : 192,210.98 = 39,389.36 : x
  2. Step 2: Convert to fraction form
    128,128.41/192,210.98 = 39,389.36/x
  3. Step 3: Cross multiply
    128,128.41x = 192,210.98 × 39,389.36
  4. Step 4: Simplify right side
    128,128.41x = 7,571,066,329.17
  5. Step 5: Solve for x
    x = 7,571,066,329.17/128,128.41
  6. Step 6: Final answer
    x = 59,089.68

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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.