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Finding the Fourth Proportional to 74,752,936.40, 112,129,404.60 and 20,165,416.40

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Solution

The fourth proportional to 74,752,936.40, 112,129,404.60 and 20,165,416.40 is: 30,248,124.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,752,936.40 : 112,129,404.60 = 20,165,416.40 : x
  2. Step 2: Convert to fraction form
    74,752,936.40/112,129,404.60 = 20,165,416.40/x
  3. Step 3: Cross multiply
    74,752,936.40x = 112,129,404.60 × 20,165,416.40
  4. Step 4: Simplify right side
    74,752,936.40x = 2,261,136,134,443,075
  5. Step 5: Solve for x
    x = 2,261,136,134,443,075/74,752,936.40
  6. Step 6: Final answer
    x = 30,248,124.60

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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.