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Finding the Fourth Proportional to 128,743.58, 193,168.71 and 69,509.63

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Solution

The fourth proportional to 128,743.58, 193,168.71 and 69,509.63 is: 104,293.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,743.58 : 193,168.71 = 69,509.63 : x
  2. Step 2: Convert to fraction form
    128,743.58/193,168.71 = 69,509.63/x
  3. Step 3: Cross multiply
    128,743.58x = 193,168.71 × 69,509.63
  4. Step 4: Simplify right side
    128,743.58x = 13,427,085,559.68
  5. Step 5: Solve for x
    x = 13,427,085,559.68/128,743.58
  6. Step 6: Final answer
    x = 104,293.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.