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Finding the Fourth Proportional to 100,125.99, 138,173.85 and 54,804.06

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Solution

The fourth proportional to 100,125.99, 138,173.85 and 54,804.06 is: 75,629.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,125.99 : 138,173.85 = 54,804.06 : x
  2. Step 2: Convert to fraction form
    100,125.99/138,173.85 = 54,804.06/x
  3. Step 3: Cross multiply
    100,125.99x = 138,173.85 × 54,804.06
  4. Step 4: Simplify right side
    100,125.99x = 7,572,487,965.83
  5. Step 5: Solve for x
    x = 7,572,487,965.83/100,125.99
  6. Step 6: Final answer
    x = 75,629.59

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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.