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Finding the Fourth Proportional to 73,872,076.80, 110,808,115.20 and 72,360,422.40

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Solution

The fourth proportional to 73,872,076.80, 110,808,115.20 and 72,360,422.40 is: 108,540,633.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,872,076.80 : 110,808,115.20 = 72,360,422.40 : x
  2. Step 2: Convert to fraction form
    73,872,076.80/110,808,115.20 = 72,360,422.40/x
  3. Step 3: Cross multiply
    73,872,076.80x = 110,808,115.20 × 72,360,422.40
  4. Step 4: Simplify right side
    73,872,076.80x = 8,018,122,021,219,861
  5. Step 5: Solve for x
    x = 8,018,122,021,219,861/73,872,076.80
  6. Step 6: Final answer
    x = 108,540,633.60

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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.