Home / 128,706.33-177,607.48-75,000.09

Finding the Fourth Proportional to 128,706.33, 177,607.48 and 75,000.09

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Solution

The fourth proportional to 128,706.33, 177,607.48 and 75,000.09 is: 103,495.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,706.33 : 177,607.48 = 75,000.09 : x
  2. Step 2: Convert to fraction form
    128,706.33/177,607.48 = 75,000.09/x
  3. Step 3: Cross multiply
    128,706.33x = 177,607.48 × 75,000.09
  4. Step 4: Simplify right side
    128,706.33x = 13,320,577,428.69
  5. Step 5: Solve for x
    x = 13,320,577,428.69/128,706.33
  6. Step 6: Final answer
    x = 103,495.90

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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.