Home / 209,127.49-313,514.86-90,709.67

Finding the Fourth Proportional to 209,127.49, 313,514.86 and 90,709.67

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Solution

The fourth proportional to 209,127.49, 313,514.86 and 90,709.67 is: 135,988.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,127.49 : 313,514.86 = 90,709.67 : x
  2. Step 2: Convert to fraction form
    209,127.49/313,514.86 = 90,709.67/x
  3. Step 3: Cross multiply
    209,127.49x = 313,514.86 × 90,709.67
  4. Step 4: Simplify right side
    209,127.49x = 28,438,829,490.70
  5. Step 5: Solve for x
    x = 28,438,829,490.70/209,127.49
  6. Step 6: Final answer
    x = 135,988.00

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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.