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Finding the Fourth Proportional to 156,361.98, 215,779.45 and 84,741.99

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Solution

The fourth proportional to 156,361.98, 215,779.45 and 84,741.99 is: 116,943.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,361.98 : 215,779.45 = 84,741.99 : x
  2. Step 2: Convert to fraction form
    156,361.98/215,779.45 = 84,741.99/x
  3. Step 3: Cross multiply
    156,361.98x = 215,779.45 × 84,741.99
  4. Step 4: Simplify right side
    156,361.98x = 18,285,579,994.11
  5. Step 5: Solve for x
    x = 18,285,579,994.11/156,361.98
  6. Step 6: Final answer
    x = 116,943.90

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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.