Home / 209,970.10-314,768.64-81,856.85

Finding the Fourth Proportional to 209,970.10, 314,768.64 and 81,856.85

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Solution

The fourth proportional to 209,970.10, 314,768.64 and 81,856.85 is: 122,712.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,970.10 : 314,768.64 = 81,856.85 : x
  2. Step 2: Convert to fraction form
    209,970.10/314,768.64 = 81,856.85/x
  3. Step 3: Cross multiply
    209,970.10x = 314,768.64 × 81,856.85
  4. Step 4: Simplify right side
    209,970.10x = 25,765,969,349.18
  5. Step 5: Solve for x
    x = 25,765,969,349.18/209,970.10
  6. Step 6: Final answer
    x = 122,712.56

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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.