Home / 128,425.26-177,234.75-71,840.46

Finding the Fourth Proportional to 128,425.26, 177,234.75 and 71,840.46

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Solution

The fourth proportional to 128,425.26, 177,234.75 and 71,840.46 is: 99,144.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,425.26 : 177,234.75 = 71,840.46 : x
  2. Step 2: Convert to fraction form
    128,425.26/177,234.75 = 71,840.46/x
  3. Step 3: Cross multiply
    128,425.26x = 177,234.75 × 71,840.46
  4. Step 4: Simplify right side
    128,425.26x = 12,732,625,967.99
  5. Step 5: Solve for x
    x = 12,732,625,967.99/128,425.26
  6. Step 6: Final answer
    x = 99,144.25

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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.