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Finding the Fourth Proportional to 64,520.67, 89,046.40 and 40,646.94

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Solution

The fourth proportional to 64,520.67, 89,046.40 and 40,646.94 is: 56,097.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,520.67 : 89,046.40 = 40,646.94 : x
  2. Step 2: Convert to fraction form
    64,520.67/89,046.40 = 40,646.94/x
  3. Step 3: Cross multiply
    64,520.67x = 89,046.40 × 40,646.94
  4. Step 4: Simplify right side
    64,520.67x = 3,619,463,678.02
  5. Step 5: Solve for x
    x = 3,619,463,678.02/64,520.67
  6. Step 6: Final answer
    x = 56,097.74

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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.