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Finding the Fourth Proportional to 145,983.61, 218,420.70 and 89,072.97

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Solution

The fourth proportional to 145,983.61, 218,420.70 and 89,072.97 is: 133,270.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,983.61 : 218,420.70 = 89,072.97 : x
  2. Step 2: Convert to fraction form
    145,983.61/218,420.70 = 89,072.97/x
  3. Step 3: Cross multiply
    145,983.61x = 218,420.70 × 89,072.97
  4. Step 4: Simplify right side
    145,983.61x = 19,455,380,458.48
  5. Step 5: Solve for x
    x = 19,455,380,458.48/145,983.61
  6. Step 6: Final answer
    x = 133,270.99

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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.