Home / 158,378.21-218,561.91-86,758.20

Finding the Fourth Proportional to 158,378.21, 218,561.91 and 86,758.20

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Solution

The fourth proportional to 158,378.21, 218,561.91 and 86,758.20 is: 119,726.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,378.21 : 218,561.91 = 86,758.20 : x
  2. Step 2: Convert to fraction form
    158,378.21/218,561.91 = 86,758.20/x
  3. Step 3: Cross multiply
    158,378.21x = 218,561.91 × 86,758.20
  4. Step 4: Simplify right side
    158,378.21x = 18,962,037,900.16
  5. Step 5: Solve for x
    x = 18,962,037,900.16/158,378.21
  6. Step 6: Final answer
    x = 119,726.31

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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.