Home / 128,422.08-177,260.48-74,731.36

Finding the Fourth Proportional to 128,422.08, 177,260.48 and 74,731.36

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Solution

The fourth proportional to 128,422.08, 177,260.48 and 74,731.36 is: 103,151.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,422.08 : 177,260.48 = 74,731.36 : x
  2. Step 2: Convert to fraction form
    128,422.08/177,260.48 = 74,731.36/x
  3. Step 3: Cross multiply
    128,422.08x = 177,260.48 × 74,731.36
  4. Step 4: Simplify right side
    128,422.08x = 13,246,916,744.65
  5. Step 5: Solve for x
    x = 13,246,916,744.65/128,422.08
  6. Step 6: Final answer
    x = 103,151.40

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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.