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Finding the Fourth Proportional to 147,663.40, 221,343.90 and 72,668.20

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Solution

The fourth proportional to 147,663.40, 221,343.90 and 72,668.20 is: 108,927.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,663.40 : 221,343.90 = 72,668.20 : x
  2. Step 2: Convert to fraction form
    147,663.40/221,343.90 = 72,668.20/x
  3. Step 3: Cross multiply
    147,663.40x = 221,343.90 × 72,668.20
  4. Step 4: Simplify right side
    147,663.40x = 16,084,662,793.98
  5. Step 5: Solve for x
    x = 16,084,662,793.98/147,663.40
  6. Step 6: Final answer
    x = 108,927.89

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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.