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Finding the Fourth Proportional to 64,969.79, 89,655.77 and 40,783.73

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Solution

The fourth proportional to 64,969.79, 89,655.77 and 40,783.73 is: 56,279.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,969.79 : 89,655.77 = 40,783.73 : x
  2. Step 2: Convert to fraction form
    64,969.79/89,655.77 = 40,783.73/x
  3. Step 3: Cross multiply
    64,969.79x = 89,655.77 × 40,783.73
  4. Step 4: Simplify right side
    64,969.79x = 3,656,496,064.42
  5. Step 5: Solve for x
    x = 3,656,496,064.42/64,969.79
  6. Step 6: Final answer
    x = 56,279.95

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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.