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Finding the Fourth Proportional to 72,433.89, 99,991.50 and 45,615.78

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Solution

The fourth proportional to 72,433.89, 99,991.50 and 45,615.78 is: 62,970.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,433.89 : 99,991.50 = 45,615.78 : x
  2. Step 2: Convert to fraction form
    72,433.89/99,991.50 = 45,615.78/x
  3. Step 3: Cross multiply
    72,433.89x = 99,991.50 × 45,615.78
  4. Step 4: Simplify right side
    72,433.89x = 4,561,190,265.87
  5. Step 5: Solve for x
    x = 4,561,190,265.87/72,433.89
  6. Step 6: Final answer
    x = 62,970.39

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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.