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Finding the Fourth Proportional to 101,635,312.80, 152,201,026.80 and 81,479,920.80

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Solution

The fourth proportional to 101,635,312.80, 152,201,026.80 and 81,479,920.80 is: 122,017,901.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,635,312.80 : 152,201,026.80 = 81,479,920.80 : x
  2. Step 2: Convert to fraction form
    101,635,312.80/152,201,026.80 = 81,479,920.80/x
  3. Step 3: Cross multiply
    101,635,312.80x = 152,201,026.80 × 81,479,920.80
  4. Step 4: Simplify right side
    101,635,312.80x = 12,401,327,609,342,678
  5. Step 5: Solve for x
    x = 12,401,327,609,342,678/101,635,312.80
  6. Step 6: Final answer
    x = 122,017,901.73

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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.