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Finding the Fourth Proportional to 64,890.36, 89,543.34 and 36,603

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Solution

The fourth proportional to 64,890.36, 89,543.34 and 36,603 is: 50,509.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,890.36 : 89,543.34 = 36,603 : x
  2. Step 2: Convert to fraction form
    64,890.36/89,543.34 = 36,603/x
  3. Step 3: Cross multiply
    64,890.36x = 89,543.34 × 36,603
  4. Step 4: Simplify right side
    64,890.36x = 3,277,554,874.02
  5. Step 5: Solve for x
    x = 3,277,554,874.02/64,890.36
  6. Step 6: Final answer
    x = 50,509.12

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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.