Home / 158,140.05-218,238.51-86,520.11

Finding the Fourth Proportional to 158,140.05, 218,238.51 and 86,520.11

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Solution

The fourth proportional to 158,140.05, 218,238.51 and 86,520.11 is: 119,400.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,140.05 : 218,238.51 = 86,520.11 : x
  2. Step 2: Convert to fraction form
    158,140.05/218,238.51 = 86,520.11/x
  3. Step 3: Cross multiply
    158,140.05x = 218,238.51 × 86,520.11
  4. Step 4: Simplify right side
    158,140.05x = 18,882,018,800.24
  5. Step 5: Solve for x
    x = 18,882,018,800.24/158,140.05
  6. Step 6: Final answer
    x = 119,400.61

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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.