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Finding the Fourth Proportional to 162,021.20, 243,031.80 and 102,923.60

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Solution

The fourth proportional to 162,021.20, 243,031.80 and 102,923.60 is: 154,385.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,021.20 : 243,031.80 = 102,923.60 : x
  2. Step 2: Convert to fraction form
    162,021.20/243,031.80 = 102,923.60/x
  3. Step 3: Cross multiply
    162,021.20x = 243,031.80 × 102,923.60
  4. Step 4: Simplify right side
    162,021.20x = 25,013,707,770.48
  5. Step 5: Solve for x
    x = 25,013,707,770.48/162,021.20
  6. Step 6: Final answer
    x = 154,385.40

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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.