Home / 128,531.30-192,830.23-75,268.28

Finding the Fourth Proportional to 128,531.30, 192,830.23 and 75,268.28

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Solution

The fourth proportional to 128,531.30, 192,830.23 and 75,268.28 is: 112,921.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,531.30 : 192,830.23 = 75,268.28 : x
  2. Step 2: Convert to fraction form
    128,531.30/192,830.23 = 75,268.28/x
  3. Step 3: Cross multiply
    128,531.30x = 192,830.23 × 75,268.28
  4. Step 4: Simplify right side
    128,531.30x = 14,514,000,038.01
  5. Step 5: Solve for x
    x = 14,514,000,038.01/128,531.30
  6. Step 6: Final answer
    x = 112,921.91

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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.