Home / 86,389.43-129,291.53-53,130.56

Finding the Fourth Proportional to 86,389.43, 129,291.53 and 53,130.56

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Solution

The fourth proportional to 86,389.43, 129,291.53 and 53,130.56 is: 79,515.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,389.43 : 129,291.53 = 53,130.56 : x
  2. Step 2: Convert to fraction form
    86,389.43/129,291.53 = 53,130.56/x
  3. Step 3: Cross multiply
    86,389.43x = 129,291.53 × 53,130.56
  4. Step 4: Simplify right side
    86,389.43x = 6,869,330,480.05
  5. Step 5: Solve for x
    x = 6,869,330,480.05/86,389.43
  6. Step 6: Final answer
    x = 79,515.87

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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.