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Finding the Fourth Proportional to 228,008.20, 342,012.30 and 85,853.20

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Solution

The fourth proportional to 228,008.20, 342,012.30 and 85,853.20 is: 128,779.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,008.20 : 342,012.30 = 85,853.20 : x
  2. Step 2: Convert to fraction form
    228,008.20/342,012.30 = 85,853.20/x
  3. Step 3: Cross multiply
    228,008.20x = 342,012.30 × 85,853.20
  4. Step 4: Simplify right side
    228,008.20x = 29,362,850,394.36
  5. Step 5: Solve for x
    x = 29,362,850,394.36/228,008.20
  6. Step 6: Final answer
    x = 128,779.80

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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.