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Finding the Fourth Proportional to 159,271.80, 219,789.50 and 87,649.98

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Solution

The fourth proportional to 159,271.80, 219,789.50 and 87,649.98 is: 120,953.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,271.80 : 219,789.50 = 87,649.98 : x
  2. Step 2: Convert to fraction form
    159,271.80/219,789.50 = 87,649.98/x
  3. Step 3: Cross multiply
    159,271.80x = 219,789.50 × 87,649.98
  4. Step 4: Simplify right side
    159,271.80x = 19,264,544,840.96
  5. Step 5: Solve for x
    x = 19,264,544,840.96/159,271.80
  6. Step 6: Final answer
    x = 120,953.90

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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.