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Finding the Fourth Proportional to 72,153.98, 99,572.19 and 40,322.87

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Solution

The fourth proportional to 72,153.98, 99,572.19 and 40,322.87 is: 55,645.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,153.98 : 99,572.19 = 40,322.87 : x
  2. Step 2: Convert to fraction form
    72,153.98/99,572.19 = 40,322.87/x
  3. Step 3: Cross multiply
    72,153.98x = 99,572.19 × 40,322.87
  4. Step 4: Simplify right side
    72,153.98x = 4,015,035,975.12
  5. Step 5: Solve for x
    x = 4,015,035,975.12/72,153.98
  6. Step 6: Final answer
    x = 55,645.39

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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.