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Finding the Fourth Proportional to 312,804,918.20, 469,065,659.70 and 118,651,806.20

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Solution

The fourth proportional to 312,804,918.20, 469,065,659.70 and 118,651,806.20 is: 177,923,953.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,804,918.20 : 469,065,659.70 = 118,651,806.20 : x
  2. Step 2: Convert to fraction form
    312,804,918.20/469,065,659.70 = 118,651,806.20/x
  3. Step 3: Cross multiply
    312,804,918.20x = 469,065,659.70 × 118,651,806.20
  4. Step 4: Simplify right side
    312,804,918.20x = 55,655,487,749,799,552
  5. Step 5: Solve for x
    x = 55,655,487,749,799,552/312,804,918.20
  6. Step 6: Final answer
    x = 177,923,953.59

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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.