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Finding the Fourth Proportional to 147,188.40, 220,609.80 and 68,135.64

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Solution

The fourth proportional to 147,188.40, 220,609.80 and 68,135.64 is: 102,123.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,188.40 : 220,609.80 = 68,135.64 : x
  2. Step 2: Convert to fraction form
    147,188.40/220,609.80 = 68,135.64/x
  3. Step 3: Cross multiply
    147,188.40x = 220,609.80 × 68,135.64
  4. Step 4: Simplify right side
    147,188.40x = 15,031,389,913.27
  5. Step 5: Solve for x
    x = 15,031,389,913.27/147,188.40
  6. Step 6: Final answer
    x = 102,123.47

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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.