Home / 86,378.40-129,559.10-30,208.14

Finding the Fourth Proportional to 86,378.40, 129,559.10 and 30,208.14

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Solution

The fourth proportional to 86,378.40, 129,559.10 and 30,208.14 is: 45,309.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,378.40 : 129,559.10 = 30,208.14 : x
  2. Step 2: Convert to fraction form
    86,378.40/129,559.10 = 30,208.14/x
  3. Step 3: Cross multiply
    86,378.40x = 129,559.10 × 30,208.14
  4. Step 4: Simplify right side
    86,378.40x = 3,913,739,280.03
  5. Step 5: Solve for x
    x = 3,913,739,280.03/86,378.40
  6. Step 6: Final answer
    x = 45,309.24

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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.