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Finding the Fourth Proportional to 156,471.93, 215,838.75 and 99,883.30

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Solution

The fourth proportional to 156,471.93, 215,838.75 and 99,883.30 is: 137,779.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,471.93 : 215,838.75 = 99,883.30 : x
  2. Step 2: Convert to fraction form
    156,471.93/215,838.75 = 99,883.30/x
  3. Step 3: Cross multiply
    156,471.93x = 215,838.75 × 99,883.30
  4. Step 4: Simplify right side
    156,471.93x = 21,558,686,617.88
  5. Step 5: Solve for x
    x = 21,558,686,617.88/156,471.93
  6. Step 6: Final answer
    x = 137,779.90

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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.