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Finding the Fourth Proportional to 68,668,045.60, 103,002,068.40 and 30,309,815.20

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Solution

The fourth proportional to 68,668,045.60, 103,002,068.40 and 30,309,815.20 is: 45,464,722.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,668,045.60 : 103,002,068.40 = 30,309,815.20 : x
  2. Step 2: Convert to fraction form
    68,668,045.60/103,002,068.40 = 30,309,815.20/x
  3. Step 3: Cross multiply
    68,668,045.60x = 103,002,068.40 × 30,309,815.20
  4. Step 4: Simplify right side
    68,668,045.60x = 3,121,973,658,421,760
  5. Step 5: Solve for x
    x = 3,121,973,658,421,760/68,668,045.60
  6. Step 6: Final answer
    x = 45,464,722.80

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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.