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Finding the Fourth Proportional to 153,608.08, 212,019.24 and 100,040.08

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Solution

The fourth proportional to 153,608.08, 212,019.24 and 100,040.08 is: 138,081.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,608.08 : 212,019.24 = 100,040.08 : x
  2. Step 2: Convert to fraction form
    153,608.08/212,019.24 = 100,040.08/x
  3. Step 3: Cross multiply
    153,608.08x = 212,019.24 × 100,040.08
  4. Step 4: Simplify right side
    153,608.08x = 21,210,421,731.14
  5. Step 5: Solve for x
    x = 21,210,421,731.14/153,608.08
  6. Step 6: Final answer
    x = 138,081.42

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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.