Home / 128,257.18-176,997-74,522.59

Finding the Fourth Proportional to 128,257.18, 176,997 and 74,522.59

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Solution

The fourth proportional to 128,257.18, 176,997 and 74,522.59 is: 102,842.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,257.18 : 176,997 = 74,522.59 : x
  2. Step 2: Convert to fraction form
    128,257.18/176,997 = 74,522.59/x
  3. Step 3: Cross multiply
    128,257.18x = 176,997 × 74,522.59
  4. Step 4: Simplify right side
    128,257.18x = 13,190,274,862.23
  5. Step 5: Solve for x
    x = 13,190,274,862.23/128,257.18
  6. Step 6: Final answer
    x = 102,842.39

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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.