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Finding the Fourth Proportional to 64,755.20, 89,369.28 and 40,880.64

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Solution

The fourth proportional to 64,755.20, 89,369.28 and 40,880.64 is: 56,419.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,755.20 : 89,369.28 = 40,880.64 : x
  2. Step 2: Convert to fraction form
    64,755.20/89,369.28 = 40,880.64/x
  3. Step 3: Cross multiply
    64,755.20x = 89,369.28 × 40,880.64
  4. Step 4: Simplify right side
    64,755.20x = 3,653,473,362.74
  5. Step 5: Solve for x
    x = 3,653,473,362.74/64,755.20
  6. Step 6: Final answer
    x = 56,419.77

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1.5x scale

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.