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Finding the Fourth Proportional to 69,147,632.40, 103,726,697.40 and 20,621,698.80

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Solution

The fourth proportional to 69,147,632.40, 103,726,697.40 and 20,621,698.80 is: 30,934,113.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,147,632.40 : 103,726,697.40 = 20,621,698.80 : x
  2. Step 2: Convert to fraction form
    69,147,632.40/103,726,697.40 = 20,621,698.80/x
  3. Step 3: Cross multiply
    69,147,632.40x = 103,726,697.40 × 20,621,698.80
  4. Step 4: Simplify right side
    69,147,632.40x = 2,139,020,711,301,543.25
  5. Step 5: Solve for x
    x = 2,139,020,711,301,543.25/69,147,632.40
  6. Step 6: Final answer
    x = 30,934,113.53

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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.