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Finding the Fourth Proportional to 156,422.88, 215,864.64 and 84,804

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Solution

The fourth proportional to 156,422.88, 215,864.64 and 84,804 is: 117,030.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,422.88 : 215,864.64 = 84,804 : x
  2. Step 2: Convert to fraction form
    156,422.88/215,864.64 = 84,804/x
  3. Step 3: Cross multiply
    156,422.88x = 215,864.64 × 84,804
  4. Step 4: Simplify right side
    156,422.88x = 18,306,184,930.56
  5. Step 5: Solve for x
    x = 18,306,184,930.56/156,422.88
  6. Step 6: Final answer
    x = 117,030.10

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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.