Home / 128,501.72-177,307.77-83,173.41

Finding the Fourth Proportional to 128,501.72, 177,307.77 and 83,173.41

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Solution

The fourth proportional to 128,501.72, 177,307.77 and 83,173.41 is: 114,763.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,501.72 : 177,307.77 = 83,173.41 : x
  2. Step 2: Convert to fraction form
    128,501.72/177,307.77 = 83,173.41/x
  3. Step 3: Cross multiply
    128,501.72x = 177,307.77 × 83,173.41
  4. Step 4: Simplify right side
    128,501.72x = 14,747,291,694.45
  5. Step 5: Solve for x
    x = 14,747,291,694.45/128,501.72
  6. Step 6: Final answer
    x = 114,763.38

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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.