Home / 141,420.84-212,188.80-90,876.54

Finding the Fourth Proportional to 141,420.84, 212,188.80 and 90,876.54

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Solution

The fourth proportional to 141,420.84, 212,188.80 and 90,876.54 is: 136,351.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,420.84 : 212,188.80 = 90,876.54 : x
  2. Step 2: Convert to fraction form
    141,420.84/212,188.80 = 90,876.54/x
  3. Step 3: Cross multiply
    141,420.84x = 212,188.80 × 90,876.54
  4. Step 4: Simplify right side
    141,420.84x = 19,282,983,970.75
  5. Step 5: Solve for x
    x = 19,282,983,970.75/141,420.84
  6. Step 6: Final answer
    x = 136,351.79

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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.