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Finding the Fourth Proportional to 64,801.08, 89,428.86 and 36,509.40

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Solution

The fourth proportional to 64,801.08, 89,428.86 and 36,509.40 is: 50,384.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,801.08 : 89,428.86 = 36,509.40 : x
  2. Step 2: Convert to fraction form
    64,801.08/89,428.86 = 36,509.40/x
  3. Step 3: Cross multiply
    64,801.08x = 89,428.86 × 36,509.40
  4. Step 4: Simplify right side
    64,801.08x = 3,264,994,021.28
  5. Step 5: Solve for x
    x = 3,264,994,021.28/64,801.08
  6. Step 6: Final answer
    x = 50,384.87

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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.