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Finding the Fourth Proportional to 89,974.40, 134,978.00 and 45,019.26

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Solution

The fourth proportional to 89,974.40, 134,978.00 and 45,019.26 is: 67,537.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,974.40 : 134,978.00 = 45,019.26 : x
  2. Step 2: Convert to fraction form
    89,974.40/134,978.00 = 45,019.26/x
  3. Step 3: Cross multiply
    89,974.40x = 134,978.00 × 45,019.26
  4. Step 4: Simplify right side
    89,974.40x = 6,076,609,451.18
  5. Step 5: Solve for x
    x = 6,076,609,451.18/89,974.40
  6. Step 6: Final answer
    x = 67,537.10

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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.