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Finding the Fourth Proportional to 72,449.40, 99,975.96 and 42,239.64

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Solution

The fourth proportional to 72,449.40, 99,975.96 and 42,239.64 is: 58,288.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,449.40 : 99,975.96 = 42,239.64 : x
  2. Step 2: Convert to fraction form
    72,449.40/99,975.96 = 42,239.64/x
  3. Step 3: Cross multiply
    72,449.40x = 99,975.96 × 42,239.64
  4. Step 4: Simplify right side
    72,449.40x = 4,222,948,559.05
  5. Step 5: Solve for x
    x = 4,222,948,559.05/72,449.40
  6. Step 6: Final answer
    x = 58,288.25

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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.