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Finding the Fourth Proportional to 68,670.81, 94,784.04 and 64,488.78

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Solution

The fourth proportional to 68,670.81, 94,784.04 and 64,488.78 is: 89,011.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,670.81 : 94,784.04 = 64,488.78 : x
  2. Step 2: Convert to fraction form
    68,670.81/94,784.04 = 64,488.78/x
  3. Step 3: Cross multiply
    68,670.81x = 94,784.04 × 64,488.78
  4. Step 4: Simplify right side
    68,670.81x = 6,112,507,103.07
  5. Step 5: Solve for x
    x = 6,112,507,103.07/68,670.81
  6. Step 6: Final answer
    x = 89,011.72

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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.