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Finding the Fourth Proportional to 156,356.58, 215,772.81 and 84,736.68

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Solution

The fourth proportional to 156,356.58, 215,772.81 and 84,736.68 is: 116,937.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,356.58 : 215,772.81 = 84,736.68 : x
  2. Step 2: Convert to fraction form
    156,356.58/215,772.81 = 84,736.68/x
  3. Step 3: Cross multiply
    156,356.58x = 215,772.81 × 84,736.68
  4. Step 4: Simplify right side
    156,356.58x = 18,283,871,553.67
  5. Step 5: Solve for x
    x = 18,283,871,553.67/156,356.58
  6. Step 6: Final answer
    x = 116,937.01

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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.