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Finding the Fourth Proportional to 64,690.38, 89,271.81 and 36,396

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Solution

The fourth proportional to 64,690.38, 89,271.81 and 36,396 is: 50,225.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,690.38 : 89,271.81 = 36,396 : x
  2. Step 2: Convert to fraction form
    64,690.38/89,271.81 = 36,396/x
  3. Step 3: Cross multiply
    64,690.38x = 89,271.81 × 36,396
  4. Step 4: Simplify right side
    64,690.38x = 3,249,136,796.76
  5. Step 5: Solve for x
    x = 3,249,136,796.76/64,690.38
  6. Step 6: Final answer
    x = 50,225.97

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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.