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Finding the Fourth Proportional to 128,894.52, 177,873.66 and 75,175.32

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Solution

The fourth proportional to 128,894.52, 177,873.66 and 75,175.32 is: 103,741.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,894.52 : 177,873.66 = 75,175.32 : x
  2. Step 2: Convert to fraction form
    128,894.52/177,873.66 = 75,175.32/x
  3. Step 3: Cross multiply
    128,894.52x = 177,873.66 × 75,175.32
  4. Step 4: Simplify right side
    128,894.52x = 13,371,709,310.07
  5. Step 5: Solve for x
    x = 13,371,709,310.07/128,894.52
  6. Step 6: Final answer
    x = 103,741.49

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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.