Home / 130,782.45-196,172.64-86,606.88

Finding the Fourth Proportional to 130,782.45, 196,172.64 and 86,606.88

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Solution

The fourth proportional to 130,782.45, 196,172.64 and 86,606.88 is: 129,909.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,782.45 : 196,172.64 = 86,606.88 : x
  2. Step 2: Convert to fraction form
    130,782.45/196,172.64 = 86,606.88/x
  3. Step 3: Cross multiply
    130,782.45x = 196,172.64 × 86,606.88
  4. Step 4: Simplify right side
    130,782.45x = 16,989,900,291.76
  5. Step 5: Solve for x
    x = 16,989,900,291.76/130,782.45
  6. Step 6: Final answer
    x = 129,909.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.