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Finding the Fourth Proportional to 98,670, 136,164.60 and 53,958

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Solution

The fourth proportional to 98,670, 136,164.60 and 53,958 is: 74,462.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,670 : 136,164.60 = 53,958 : x
  2. Step 2: Convert to fraction form
    98,670/136,164.60 = 53,958/x
  3. Step 3: Cross multiply
    98,670x = 136,164.60 × 53,958
  4. Step 4: Simplify right side
    98,670x = 7,347,169,486.80
  5. Step 5: Solve for x
    x = 7,347,169,486.80/98,670
  6. Step 6: Final answer
    x = 74,462.04

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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.