Home / 86,378.30-129,605.08-30,258.74

Finding the Fourth Proportional to 86,378.30, 129,605.08 and 30,258.74

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Solution

The fourth proportional to 86,378.30, 129,605.08 and 30,258.74 is: 45,401.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,378.30 : 129,605.08 = 30,258.74 : x
  2. Step 2: Convert to fraction form
    86,378.30/129,605.08 = 30,258.74/x
  3. Step 3: Cross multiply
    86,378.30x = 129,605.08 × 30,258.74
  4. Step 4: Simplify right side
    86,378.30x = 3,921,686,418.40
  5. Step 5: Solve for x
    x = 3,921,686,418.40/86,378.30
  6. Step 6: Final answer
    x = 45,401.29

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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.