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Finding the Fourth Proportional to 28,978,048.80, 43,467,073.20 and 8,780,666.40

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Solution

The fourth proportional to 28,978,048.80, 43,467,073.20 and 8,780,666.40 is: 13,170,999.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978,048.80 : 43,467,073.20 = 8,780,666.40 : x
  2. Step 2: Convert to fraction form
    28,978,048.80/43,467,073.20 = 8,780,666.40/x
  3. Step 3: Cross multiply
    28,978,048.80x = 43,467,073.20 × 8,780,666.40
  4. Step 4: Simplify right side
    28,978,048.80x = 381,669,869,153,580.50
  5. Step 5: Solve for x
    x = 381,669,869,153,580.50/28,978,048.80
  6. Step 6: Final answer
    x = 13,170,999.60

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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.