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Finding the Fourth Proportional to 100,260.90, 138,360.07 and 54,938.51

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Solution

The fourth proportional to 100,260.90, 138,360.07 and 54,938.51 is: 75,815.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,260.90 : 138,360.07 = 54,938.51 : x
  2. Step 2: Convert to fraction form
    100,260.90/138,360.07 = 54,938.51/x
  3. Step 3: Cross multiply
    100,260.90x = 138,360.07 × 54,938.51
  4. Step 4: Simplify right side
    100,260.90x = 7,601,296,089.30
  5. Step 5: Solve for x
    x = 7,601,296,089.30/100,260.90
  6. Step 6: Final answer
    x = 75,815.16

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1.5x scale

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.