Home / 212,357.60-318,647.06-86,091.15

Finding the Fourth Proportional to 212,357.60, 318,647.06 and 86,091.15

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Solution

The fourth proportional to 212,357.60, 318,647.06 and 86,091.15 is: 129,181.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,357.60 : 318,647.06 = 86,091.15 : x
  2. Step 2: Convert to fraction form
    212,357.60/318,647.06 = 86,091.15/x
  3. Step 3: Cross multiply
    212,357.60x = 318,647.06 × 86,091.15
  4. Step 4: Simplify right side
    212,357.60x = 27,432,693,411.09
  5. Step 5: Solve for x
    x = 27,432,693,411.09/212,357.60
  6. Step 6: Final answer
    x = 129,181.60

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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.