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Finding the Fourth Proportional to 212,955.89, 319,364.69 and 70,763.00

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Solution

The fourth proportional to 212,955.89, 319,364.69 and 70,763.00 is: 106,121.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,955.89 : 319,364.69 = 70,763.00 : x
  2. Step 2: Convert to fraction form
    212,955.89/319,364.69 = 70,763.00/x
  3. Step 3: Cross multiply
    212,955.89x = 319,364.69 × 70,763.00
  4. Step 4: Simplify right side
    212,955.89x = 22,599,201,607.83
  5. Step 5: Solve for x
    x = 22,599,201,607.83/212,955.89
  6. Step 6: Final answer
    x = 106,121.52

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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.