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Finding the Fourth Proportional to 163,679.70, 245,519.55 and 128,250.30

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Solution

The fourth proportional to 163,679.70, 245,519.55 and 128,250.30 is: 192,375.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,679.70 : 245,519.55 = 128,250.30 : x
  2. Step 2: Convert to fraction form
    163,679.70/245,519.55 = 128,250.30/x
  3. Step 3: Cross multiply
    163,679.70x = 245,519.55 × 128,250.30
  4. Step 4: Simplify right side
    163,679.70x = 31,487,955,943.37
  5. Step 5: Solve for x
    x = 31,487,955,943.37/163,679.70
  6. Step 6: Final answer
    x = 192,375.45

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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.