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Finding the Fourth Proportional to 78,888,687.82, 108,877,203.71 and 45,397,478.90

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Solution

The fourth proportional to 78,888,687.82, 108,877,203.71 and 45,397,478.90 is: 62,654,744.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,888,687.82 : 108,877,203.71 = 45,397,478.90 : x
  2. Step 2: Convert to fraction form
    78,888,687.82/108,877,203.71 = 45,397,478.90/x
  3. Step 3: Cross multiply
    78,888,687.82x = 108,877,203.71 × 45,397,478.90
  4. Step 4: Simplify right side
    78,888,687.82x = 4,942,750,558,331,173
  5. Step 5: Solve for x
    x = 4,942,750,558,331,173/78,888,687.82
  6. Step 6: Final answer
    x = 62,654,744.24

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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.