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Finding the Fourth Proportional to 156,381.57, 215,807.72 and 84,762.11

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Solution

The fourth proportional to 156,381.57, 215,807.72 and 84,762.11 is: 116,972.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,381.57 : 215,807.72 = 84,762.11 : x
  2. Step 2: Convert to fraction form
    156,381.57/215,807.72 = 84,762.11/x
  3. Step 3: Cross multiply
    156,381.57x = 215,807.72 × 84,762.11
  4. Step 4: Simplify right side
    156,381.57x = 18,292,316,198.64
  5. Step 5: Solve for x
    x = 18,292,316,198.64/156,381.57
  6. Step 6: Final answer
    x = 116,972.33

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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.