Home / 153,405.12-211,698.96-86,338.56

Finding the Fourth Proportional to 153,405.12, 211,698.96 and 86,338.56

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Solution

The fourth proportional to 153,405.12, 211,698.96 and 86,338.56 is: 119,147.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,405.12 : 211,698.96 = 86,338.56 : x
  2. Step 2: Convert to fraction form
    153,405.12/211,698.96 = 86,338.56/x
  3. Step 3: Cross multiply
    153,405.12x = 211,698.96 × 86,338.56
  4. Step 4: Simplify right side
    153,405.12x = 18,277,783,359.90
  5. Step 5: Solve for x
    x = 18,277,783,359.90/153,405.12
  6. Step 6: Final answer
    x = 119,147.15

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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.