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Finding the Fourth Proportional to 118,839.40, 163,998.38 and 68,538.40

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Solution

The fourth proportional to 118,839.40, 163,998.38 and 68,538.40 is: 94,583.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,839.40 : 163,998.38 = 68,538.40 : x
  2. Step 2: Convert to fraction form
    118,839.40/163,998.38 = 68,538.40/x
  3. Step 3: Cross multiply
    118,839.40x = 163,998.38 × 68,538.40
  4. Step 4: Simplify right side
    118,839.40x = 11,240,186,567.79
  5. Step 5: Solve for x
    x = 11,240,186,567.79/118,839.40
  6. Step 6: Final answer
    x = 94,583.00

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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.