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Finding the Fourth Proportional to 128,752, 193,119.36 and 35,258.56

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Solution

The fourth proportional to 128,752, 193,119.36 and 35,258.56 is: 52,885.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,752 : 193,119.36 = 35,258.56 : x
  2. Step 2: Convert to fraction form
    128,752/193,119.36 = 35,258.56/x
  3. Step 3: Cross multiply
    128,752x = 193,119.36 × 35,258.56
  4. Step 4: Simplify right side
    128,752x = 6,809,110,541.72
  5. Step 5: Solve for x
    x = 6,809,110,541.72/128,752
  6. Step 6: Final answer
    x = 52,885.47

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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.