Home / 209,219,804-288,725,985.72-115,144,782.56

Finding the Fourth Proportional to 209,219,804, 288,725,985.72 and 115,144,782.56

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Solution

The fourth proportional to 209,219,804, 288,725,985.72 and 115,144,782.56 is: 158,901,261.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,219,804 : 288,725,985.72 = 115,144,782.56 : x
  2. Step 2: Convert to fraction form
    209,219,804/288,725,985.72 = 115,144,782.56/x
  3. Step 3: Cross multiply
    209,219,804x = 288,725,985.72 × 115,144,782.56
  4. Step 4: Simplify right side
    209,219,804x = 33,245,290,845,151,068
  5. Step 5: Solve for x
    x = 33,245,290,845,151,068/209,219,804
  6. Step 6: Final answer
    x = 158,901,261.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.