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Finding the Fourth Proportional to 70,110,001.20, 105,165,001.80 and 53,103,889.20

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Solution

The fourth proportional to 70,110,001.20, 105,165,001.80 and 53,103,889.20 is: 79,655,833.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,110,001.20 : 105,165,001.80 = 53,103,889.20 : x
  2. Step 2: Convert to fraction form
    70,110,001.20/105,165,001.80 = 53,103,889.20/x
  3. Step 3: Cross multiply
    70,110,001.20x = 105,165,001.80 × 53,103,889.20
  4. Step 4: Simplify right side
    70,110,001.20x = 5,584,670,603,305,001
  5. Step 5: Solve for x
    x = 5,584,670,603,305,001/70,110,001.20
  6. Step 6: Final answer
    x = 79,655,833.80

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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.