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Finding the Fourth Proportional to 235,580.64, 325,106.55 and 128,156.46

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Solution

The fourth proportional to 235,580.64, 325,106.55 and 128,156.46 is: 176,858.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,580.64 : 325,106.55 = 128,156.46 : x
  2. Step 2: Convert to fraction form
    235,580.64/325,106.55 = 128,156.46/x
  3. Step 3: Cross multiply
    235,580.64x = 325,106.55 × 128,156.46
  4. Step 4: Simplify right side
    235,580.64x = 41,664,504,570.81
  5. Step 5: Solve for x
    x = 41,664,504,570.81/235,580.64
  6. Step 6: Final answer
    x = 176,858.78

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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.