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Finding the Fourth Proportional to 156,320.97, 215,722.28 and 84,701.28

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Solution

The fourth proportional to 156,320.97, 215,722.28 and 84,701.28 is: 116,887.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,320.97 : 215,722.28 = 84,701.28 : x
  2. Step 2: Convert to fraction form
    156,320.97/215,722.28 = 84,701.28/x
  3. Step 3: Cross multiply
    156,320.97x = 215,722.28 × 84,701.28
  4. Step 4: Simplify right side
    156,320.97x = 18,271,952,817.01
  5. Step 5: Solve for x
    x = 18,271,952,817.01/156,320.97
  6. Step 6: Final answer
    x = 116,887.41

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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.