Home / 218,490.12-301,511.72-121,693.67

Finding the Fourth Proportional to 218,490.12, 301,511.72 and 121,693.67

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Solution

The fourth proportional to 218,490.12, 301,511.72 and 121,693.67 is: 167,934.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,490.12 : 301,511.72 = 121,693.67 : x
  2. Step 2: Convert to fraction form
    218,490.12/301,511.72 = 121,693.67/x
  3. Step 3: Cross multiply
    218,490.12x = 301,511.72 × 121,693.67
  4. Step 4: Simplify right side
    218,490.12x = 36,692,065,638.79
  5. Step 5: Solve for x
    x = 36,692,065,638.79/218,490.12
  6. Step 6: Final answer
    x = 167,934.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.