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Finding the Fourth Proportional to 64,541.88, 89,045.64 and 40,326.42

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Solution

The fourth proportional to 64,541.88, 89,045.64 and 40,326.42 is: 55,636.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,541.88 : 89,045.64 = 40,326.42 : x
  2. Step 2: Convert to fraction form
    64,541.88/89,045.64 = 40,326.42/x
  3. Step 3: Cross multiply
    64,541.88x = 89,045.64 × 40,326.42
  4. Step 4: Simplify right side
    64,541.88x = 3,590,891,877.81
  5. Step 5: Solve for x
    x = 3,590,891,877.81/64,541.88
  6. Step 6: Final answer
    x = 55,636.62

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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.