Home / 86,839.20-130,172.40-40,010.40

Finding the Fourth Proportional to 86,839.20, 130,172.40 and 40,010.40

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Solution

The fourth proportional to 86,839.20, 130,172.40 and 40,010.40 is: 59,975.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,839.20 : 130,172.40 = 40,010.40 : x
  2. Step 2: Convert to fraction form
    86,839.20/130,172.40 = 40,010.40/x
  3. Step 3: Cross multiply
    86,839.20x = 130,172.40 × 40,010.40
  4. Step 4: Simplify right side
    86,839.20x = 5,208,249,792.96
  5. Step 5: Solve for x
    x = 5,208,249,792.96/86,839.20
  6. Step 6: Final answer
    x = 59,975.79

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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.