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Finding the Fourth Proportional to 64,655.90, 89,237.39 and 40,468.08

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Solution

The fourth proportional to 64,655.90, 89,237.39 and 40,468.08 is: 55,853.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,655.90 : 89,237.39 = 40,468.08 : x
  2. Step 2: Convert to fraction form
    64,655.90/89,237.39 = 40,468.08/x
  3. Step 3: Cross multiply
    64,655.90x = 89,237.39 × 40,468.08
  4. Step 4: Simplify right side
    64,655.90x = 3,611,265,635.17
  5. Step 5: Solve for x
    x = 3,611,265,635.17/64,655.90
  6. Step 6: Final answer
    x = 55,853.62

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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.