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Finding the Fourth Proportional to 72,373.99, 99,881.64 and 45,539.50

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Solution

The fourth proportional to 72,373.99, 99,881.64 and 45,539.50 is: 62,847.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,373.99 : 99,881.64 = 45,539.50 : x
  2. Step 2: Convert to fraction form
    72,373.99/99,881.64 = 45,539.50/x
  3. Step 3: Cross multiply
    72,373.99x = 99,881.64 × 45,539.50
  4. Step 4: Simplify right side
    72,373.99x = 4,548,559,944.78
  5. Step 5: Solve for x
    x = 4,548,559,944.78/72,373.99
  6. Step 6: Final answer
    x = 62,847.99

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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.