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Finding the Fourth Proportional to 246,991.26, 370,448.10 and 78,489.40

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Solution

The fourth proportional to 246,991.26, 370,448.10 and 78,489.40 is: 117,721.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    246,991.26 : 370,448.10 = 78,489.40 : x
  2. Step 2: Convert to fraction form
    246,991.26/370,448.10 = 78,489.40/x
  3. Step 3: Cross multiply
    246,991.26x = 370,448.10 × 78,489.40
  4. Step 4: Simplify right side
    246,991.26x = 29,076,249,100.14
  5. Step 5: Solve for x
    x = 29,076,249,100.14/246,991.26
  6. Step 6: Final answer
    x = 117,721.77

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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.