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Finding the Fourth Proportional to 128,636.58, 177,540.45 and 74,953.41

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Solution

The fourth proportional to 128,636.58, 177,540.45 and 74,953.41 is: 103,448.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,636.58 : 177,540.45 = 74,953.41 : x
  2. Step 2: Convert to fraction form
    128,636.58/177,540.45 = 74,953.41/x
  3. Step 3: Cross multiply
    128,636.58x = 177,540.45 × 74,953.41
  4. Step 4: Simplify right side
    128,636.58x = 13,307,262,140.43
  5. Step 5: Solve for x
    x = 13,307,262,140.43/128,636.58
  6. Step 6: Final answer
    x = 103,448.51

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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.