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Finding the Fourth Proportional to 73,872,003.80, 110,808,005.70 and 20,019,315.80

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Solution

The fourth proportional to 73,872,003.80, 110,808,005.70 and 20,019,315.80 is: 30,028,973.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,872,003.80 : 110,808,005.70 = 20,019,315.80 : x
  2. Step 2: Convert to fraction form
    73,872,003.80/110,808,005.70 = 20,019,315.80/x
  3. Step 3: Cross multiply
    73,872,003.80x = 110,808,005.70 × 20,019,315.80
  4. Step 4: Simplify right side
    73,872,003.80x = 2,218,300,459,276,500.25
  5. Step 5: Solve for x
    x = 2,218,300,459,276,500.25/73,872,003.80
  6. Step 6: Final answer
    x = 30,028,973.70

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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.