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Finding the Fourth Proportional to 235,886.15, 325,526.78 and 128,458.28

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Solution

The fourth proportional to 235,886.15, 325,526.78 and 128,458.28 is: 177,274.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,886.15 : 325,526.78 = 128,458.28 : x
  2. Step 2: Convert to fraction form
    235,886.15/325,526.78 = 128,458.28/x
  3. Step 3: Cross multiply
    235,886.15x = 325,526.78 × 128,458.28
  4. Step 4: Simplify right side
    235,886.15x = 41,816,610,252.74
  5. Step 5: Solve for x
    x = 41,816,610,252.74/235,886.15
  6. Step 6: Final answer
    x = 177,274.55

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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.