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Finding the Fourth Proportional to 72,343.80, 108,515.70 and 46,067.40

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Solution

The fourth proportional to 72,343.80, 108,515.70 and 46,067.40 is: 69,101.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,343.80 : 108,515.70 = 46,067.40 : x
  2. Step 2: Convert to fraction form
    72,343.80/108,515.70 = 46,067.40/x
  3. Step 3: Cross multiply
    72,343.80x = 108,515.70 × 46,067.40
  4. Step 4: Simplify right side
    72,343.80x = 4,999,036,158.18
  5. Step 5: Solve for x
    x = 4,999,036,158.18/72,343.80
  6. Step 6: Final answer
    x = 69,101.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.