Home / 212,619.80-318,929.70-118,141.40

Finding the Fourth Proportional to 212,619.80, 318,929.70 and 118,141.40

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Solution

The fourth proportional to 212,619.80, 318,929.70 and 118,141.40 is: 177,212.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,619.80 : 318,929.70 = 118,141.40 : x
  2. Step 2: Convert to fraction form
    212,619.80/318,929.70 = 118,141.40/x
  3. Step 3: Cross multiply
    212,619.80x = 318,929.70 × 118,141.40
  4. Step 4: Simplify right side
    212,619.80x = 37,678,801,259.58
  5. Step 5: Solve for x
    x = 37,678,801,259.58/212,619.80
  6. Step 6: Final answer
    x = 177,212.10

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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.