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Finding the Fourth Proportional to 30,339,954.60, 45,509,931.90 and 20,136,287.40

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Solution

The fourth proportional to 30,339,954.60, 45,509,931.90 and 20,136,287.40 is: 30,204,431.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,339,954.60 : 45,509,931.90 = 20,136,287.40 : x
  2. Step 2: Convert to fraction form
    30,339,954.60/45,509,931.90 = 20,136,287.40/x
  3. Step 3: Cross multiply
    30,339,954.60x = 45,509,931.90 × 20,136,287.40
  4. Step 4: Simplify right side
    30,339,954.60x = 916,401,068,292,828
  5. Step 5: Solve for x
    x = 916,401,068,292,828/30,339,954.60
  6. Step 6: Final answer
    x = 30,204,431.10

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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.