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Finding the Fourth Proportional to 152,998.50, 211,157.73 and 85,930.50

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Solution

The fourth proportional to 152,998.50, 211,157.73 and 85,930.50 is: 118,595.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,998.50 : 211,157.73 = 85,930.50 : x
  2. Step 2: Convert to fraction form
    152,998.50/211,157.73 = 85,930.50/x
  3. Step 3: Cross multiply
    152,998.50x = 211,157.73 × 85,930.50
  4. Step 4: Simplify right side
    152,998.50x = 18,144,889,317.77
  5. Step 5: Solve for x
    x = 18,144,889,317.77/152,998.50
  6. Step 6: Final answer
    x = 118,595.21

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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.