Home / 86,378.81-129,574.42-30,212.60

Finding the Fourth Proportional to 86,378.81, 129,574.42 and 30,212.60

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Solution

The fourth proportional to 86,378.81, 129,574.42 and 30,212.60 is: 45,321.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,378.81 : 129,574.42 = 30,212.60 : x
  2. Step 2: Convert to fraction form
    86,378.81/129,574.42 = 30,212.60/x
  3. Step 3: Cross multiply
    86,378.81x = 129,574.42 × 30,212.60
  4. Step 4: Simplify right side
    86,378.81x = 3,914,779,398.29
  5. Step 5: Solve for x
    x = 3,914,779,398.29/86,378.81
  6. Step 6: Final answer
    x = 45,321.06

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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.