Home / 81,013.19-121,539.38-30,412.67

Finding the Fourth Proportional to 81,013.19, 121,539.38 and 30,412.67

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Solution

The fourth proportional to 81,013.19, 121,539.38 and 30,412.67 is: 45,626.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,013.19 : 121,539.38 = 30,412.67 : x
  2. Step 2: Convert to fraction form
    81,013.19/121,539.38 = 30,412.67/x
  3. Step 3: Cross multiply
    81,013.19x = 121,539.38 × 30,412.67
  4. Step 4: Simplify right side
    81,013.19x = 3,696,336,296.18
  5. Step 5: Solve for x
    x = 3,696,336,296.18/81,013.19
  6. Step 6: Final answer
    x = 45,626.35

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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.