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Finding the Fourth Proportional to 156,881.87, 216,498.66 and 85,261.89

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Solution

The fourth proportional to 156,881.87, 216,498.66 and 85,261.89 is: 117,662.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,881.87 : 216,498.66 = 85,261.89 : x
  2. Step 2: Convert to fraction form
    156,881.87/216,498.66 = 85,261.89/x
  3. Step 3: Cross multiply
    156,881.87x = 216,498.66 × 85,261.89
  4. Step 4: Simplify right side
    156,881.87x = 18,459,085,426.21
  5. Step 5: Solve for x
    x = 18,459,085,426.21/156,881.87
  6. Step 6: Final answer
    x = 117,662.32

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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.