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Finding the Fourth Proportional to 72,482.40, 108,710.96 and 19,174.90

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Solution

The fourth proportional to 72,482.40, 108,710.96 and 19,174.90 is: 28,759.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,482.40 : 108,710.96 = 19,174.90 : x
  2. Step 2: Convert to fraction form
    72,482.40/108,710.96 = 19,174.90/x
  3. Step 3: Cross multiply
    72,482.40x = 108,710.96 × 19,174.90
  4. Step 4: Simplify right side
    72,482.40x = 2,084,521,786.90
  5. Step 5: Solve for x
    x = 2,084,521,786.90/72,482.40
  6. Step 6: Final answer
    x = 28,759.01

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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.