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Finding the Fourth Proportional to 99,999.72, 138,003.90 and 54,675.00

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Solution

The fourth proportional to 99,999.72, 138,003.90 and 54,675.00 is: 75,453.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,999.72 : 138,003.90 = 54,675.00 : x
  2. Step 2: Convert to fraction form
    99,999.72/138,003.90 = 54,675.00/x
  3. Step 3: Cross multiply
    99,999.72x = 138,003.90 × 54,675.00
  4. Step 4: Simplify right side
    99,999.72x = 7,545,362,946.88
  5. Step 5: Solve for x
    x = 7,545,362,946.88/99,999.72
  6. Step 6: Final answer
    x = 75,453.84

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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.