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Finding the Fourth Proportional to 134,256, 185,273.28 and 74,640

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Solution

The fourth proportional to 134,256, 185,273.28 and 74,640 is: 103,003.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,256 : 185,273.28 = 74,640 : x
  2. Step 2: Convert to fraction form
    134,256/185,273.28 = 74,640/x
  3. Step 3: Cross multiply
    134,256x = 185,273.28 × 74,640
  4. Step 4: Simplify right side
    134,256x = 13,828,797,619.20
  5. Step 5: Solve for x
    x = 13,828,797,619.20/134,256
  6. Step 6: Final answer
    x = 103,003.20

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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.