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Finding the Fourth Proportional to 72,670.59, 108,984.83 and 28,287.45

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Solution

The fourth proportional to 72,670.59, 108,984.83 and 28,287.45 is: 42,422.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,670.59 : 108,984.83 = 28,287.45 : x
  2. Step 2: Convert to fraction form
    72,670.59/108,984.83 = 28,287.45/x
  3. Step 3: Cross multiply
    72,670.59x = 108,984.83 × 28,287.45
  4. Step 4: Simplify right side
    72,670.59x = 3,082,902,787.95
  5. Step 5: Solve for x
    x = 3,082,902,787.95/72,670.59
  6. Step 6: Final answer
    x = 42,422.98

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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.