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Finding the Fourth Proportional to 98,860, 136,426.80 and 54,148.96

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Solution

The fourth proportional to 98,860, 136,426.80 and 54,148.96 is: 74,725.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,860 : 136,426.80 = 54,148.96 : x
  2. Step 2: Convert to fraction form
    98,860/136,426.80 = 54,148.96/x
  3. Step 3: Cross multiply
    98,860x = 136,426.80 × 54,148.96
  4. Step 4: Simplify right side
    98,860x = 7,387,369,336.13
  5. Step 5: Solve for x
    x = 7,387,369,336.13/98,860
  6. Step 6: Final answer
    x = 74,725.56

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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.