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Finding the Fourth Proportional to 79,746,912.60, 119,620,368.90 and 28,622,288.40

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Solution

The fourth proportional to 79,746,912.60, 119,620,368.90 and 28,622,288.40 is: 42,933,432.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,746,912.60 : 119,620,368.90 = 28,622,288.40 : x
  2. Step 2: Convert to fraction form
    79,746,912.60/119,620,368.90 = 28,622,288.40/x
  3. Step 3: Cross multiply
    79,746,912.60x = 119,620,368.90 × 28,622,288.40
  4. Step 4: Simplify right side
    79,746,912.60x = 3,423,808,697,170,191
  5. Step 5: Solve for x
    x = 3,423,808,697,170,191/79,746,912.60
  6. Step 6: Final answer
    x = 42,933,432.60

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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.