Home / 205,838.10-308,680.35-81,153.30

Finding the Fourth Proportional to 205,838.10, 308,680.35 and 81,153.30

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Solution

The fourth proportional to 205,838.10, 308,680.35 and 81,153.30 is: 121,699.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,838.10 : 308,680.35 = 81,153.30 : x
  2. Step 2: Convert to fraction form
    205,838.10/308,680.35 = 81,153.30/x
  3. Step 3: Cross multiply
    205,838.10x = 308,680.35 × 81,153.30
  4. Step 4: Simplify right side
    205,838.10x = 25,050,429,047.66
  5. Step 5: Solve for x
    x = 25,050,429,047.66/205,838.10
  6. Step 6: Final answer
    x = 121,699.67

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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.