Home / 158,121.32-218,209.14-86,499.80

Finding the Fourth Proportional to 158,121.32, 218,209.14 and 86,499.80

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Solution

The fourth proportional to 158,121.32, 218,209.14 and 86,499.80 is: 119,370.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,121.32 : 218,209.14 = 86,499.80 : x
  2. Step 2: Convert to fraction form
    158,121.32/218,209.14 = 86,499.80/x
  3. Step 3: Cross multiply
    158,121.32x = 218,209.14 × 86,499.80
  4. Step 4: Simplify right side
    158,121.32x = 18,875,046,535.67
  5. Step 5: Solve for x
    x = 18,875,046,535.67/158,121.32
  6. Step 6: Final answer
    x = 119,370.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.