Home / 86,579.48-129,882.21-30,409.69

Finding the Fourth Proportional to 86,579.48, 129,882.21 and 30,409.69

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Solution

The fourth proportional to 86,579.48, 129,882.21 and 30,409.69 is: 45,619.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,579.48 : 129,882.21 = 30,409.69 : x
  2. Step 2: Convert to fraction form
    86,579.48/129,882.21 = 30,409.69/x
  3. Step 3: Cross multiply
    86,579.48x = 129,882.21 × 30,409.69
  4. Step 4: Simplify right side
    86,579.48x = 3,949,677,547.40
  5. Step 5: Solve for x
    x = 3,949,677,547.40/86,579.48
  6. Step 6: Final answer
    x = 45,619.10

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1.5x scale

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.