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Finding the Fourth Proportional to 156,392.06, 215,820.82 and 84,772.06

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Solution

The fourth proportional to 156,392.06, 215,820.82 and 84,772.06 is: 116,985.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,392.06 : 215,820.82 = 84,772.06 : x
  2. Step 2: Convert to fraction form
    156,392.06/215,820.82 = 84,772.06/x
  3. Step 3: Cross multiply
    156,392.06x = 215,820.82 × 84,772.06
  4. Step 4: Simplify right side
    156,392.06x = 18,295,575,068.70
  5. Step 5: Solve for x
    x = 18,295,575,068.70/156,392.06
  6. Step 6: Final answer
    x = 116,985.32

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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.