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Finding the Fourth Proportional to 72,866.70, 100,558.53 and 42,654.84

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Solution

The fourth proportional to 72,866.70, 100,558.53 and 42,654.84 is: 58,865.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,866.70 : 100,558.53 = 42,654.84 : x
  2. Step 2: Convert to fraction form
    72,866.70/100,558.53 = 42,654.84/x
  3. Step 3: Cross multiply
    72,866.70x = 100,558.53 × 42,654.84
  4. Step 4: Simplify right side
    72,866.70x = 4,289,308,007.79
  5. Step 5: Solve for x
    x = 4,289,308,007.79/72,866.70
  6. Step 6: Final answer
    x = 58,865.13

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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.