Home / 309,921.51-465,061.75-129,990.93

Finding the Fourth Proportional to 309,921.51, 465,061.75 and 129,990.93

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Solution

The fourth proportional to 309,921.51, 465,061.75 and 129,990.93 is: 195,061.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,921.51 : 465,061.75 = 129,990.93 : x
  2. Step 2: Convert to fraction form
    309,921.51/465,061.75 = 129,990.93/x
  3. Step 3: Cross multiply
    309,921.51x = 465,061.75 × 129,990.93
  4. Step 4: Simplify right side
    309,921.51x = 60,453,809,389.93
  5. Step 5: Solve for x
    x = 60,453,809,389.93/309,921.51
  6. Step 6: Final answer
    x = 195,061.68

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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.