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Finding the Fourth Proportional to 131,688.98, 197,553.99 and 42,921.89

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Solution

The fourth proportional to 131,688.98, 197,553.99 and 42,921.89 is: 64,389.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,688.98 : 197,553.99 = 42,921.89 : x
  2. Step 2: Convert to fraction form
    131,688.98/197,553.99 = 42,921.89/x
  3. Step 3: Cross multiply
    131,688.98x = 197,553.99 × 42,921.89
  4. Step 4: Simplify right side
    131,688.98x = 8,479,390,627.84
  5. Step 5: Solve for x
    x = 8,479,390,627.84/131,688.98
  6. Step 6: Final answer
    x = 64,389.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.