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Finding the Fourth Proportional to 30,919,901.60, 46,379,852.40 and 19,423,863.20

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Solution

The fourth proportional to 30,919,901.60, 46,379,852.40 and 19,423,863.20 is: 29,135,794.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,919,901.60 : 46,379,852.40 = 19,423,863.20 : x
  2. Step 2: Convert to fraction form
    30,919,901.60/46,379,852.40 = 19,423,863.20/x
  3. Step 3: Cross multiply
    30,919,901.60x = 46,379,852.40 × 19,423,863.20
  4. Step 4: Simplify right side
    30,919,901.60x = 900,875,908,253,791.62
  5. Step 5: Solve for x
    x = 900,875,908,253,791.62/30,919,901.60
  6. Step 6: Final answer
    x = 29,135,794.80

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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.