Home / 86,420.40-129,670.69-36,512.15

Finding the Fourth Proportional to 86,420.40, 129,670.69 and 36,512.15

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Solution

The fourth proportional to 86,420.40, 129,670.69 and 36,512.15 is: 54,785.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,420.40 : 129,670.69 = 36,512.15 : x
  2. Step 2: Convert to fraction form
    86,420.40/129,670.69 = 36,512.15/x
  3. Step 3: Cross multiply
    86,420.40x = 129,670.69 × 36,512.15
  4. Step 4: Simplify right side
    86,420.40x = 4,734,555,450.99
  5. Step 5: Solve for x
    x = 4,734,555,450.99/86,420.40
  6. Step 6: Final answer
    x = 54,785.16

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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.