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Finding the Fourth Proportional to 141,699.69, 212,316.25 and 99,009.45

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Solution

The fourth proportional to 141,699.69, 212,316.25 and 99,009.45 is: 148,351.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,699.69 : 212,316.25 = 99,009.45 : x
  2. Step 2: Convert to fraction form
    141,699.69/212,316.25 = 99,009.45/x
  3. Step 3: Cross multiply
    141,699.69x = 212,316.25 × 99,009.45
  4. Step 4: Simplify right side
    141,699.69x = 21,021,315,138.56
  5. Step 5: Solve for x
    x = 21,021,315,138.56/141,699.69
  6. Step 6: Final answer
    x = 148,351.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.