Home / 153,780.24-212,216.76-86,712.24

Finding the Fourth Proportional to 153,780.24, 212,216.76 and 86,712.24

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Solution

The fourth proportional to 153,780.24, 212,216.76 and 86,712.24 is: 119,662.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,780.24 : 212,216.76 = 86,712.24 : x
  2. Step 2: Convert to fraction form
    153,780.24/212,216.76 = 86,712.24/x
  3. Step 3: Cross multiply
    153,780.24x = 212,216.76 × 86,712.24
  4. Step 4: Simplify right side
    153,780.24x = 18,401,790,625.14
  5. Step 5: Solve for x
    x = 18,401,790,625.14/153,780.24
  6. Step 6: Final answer
    x = 119,662.91

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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.