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Finding the Fourth Proportional to 219,051.88, 328,577.82 and 85,994.80

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Solution

The fourth proportional to 219,051.88, 328,577.82 and 85,994.80 is: 128,992.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,051.88 : 328,577.82 = 85,994.80 : x
  2. Step 2: Convert to fraction form
    219,051.88/328,577.82 = 85,994.80/x
  3. Step 3: Cross multiply
    219,051.88x = 328,577.82 × 85,994.80
  4. Step 4: Simplify right side
    219,051.88x = 28,255,983,915.34
  5. Step 5: Solve for x
    x = 28,255,983,915.34/219,051.88
  6. Step 6: Final answer
    x = 128,992.20

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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.