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Finding the Fourth Proportional to 156,356.84, 215,772.41 and 84,736.87

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Solution

The fourth proportional to 156,356.84, 215,772.41 and 84,736.87 is: 116,936.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,356.84 : 215,772.41 = 84,736.87 : x
  2. Step 2: Convert to fraction form
    156,356.84/215,772.41 = 84,736.87/x
  3. Step 3: Cross multiply
    156,356.84x = 215,772.41 × 84,736.87
  4. Step 4: Simplify right side
    156,356.84x = 18,283,878,328.17
  5. Step 5: Solve for x
    x = 18,283,878,328.17/156,356.84
  6. Step 6: Final answer
    x = 116,936.86

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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.