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Finding the Fourth Proportional to 128,894,697.60, 193,342,046.40 and 71,563,804.80

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Solution

The fourth proportional to 128,894,697.60, 193,342,046.40 and 71,563,804.80 is: 107,345,707.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,894,697.60 : 193,342,046.40 = 71,563,804.80 : x
  2. Step 2: Convert to fraction form
    128,894,697.60/193,342,046.40 = 71,563,804.80/x
  3. Step 3: Cross multiply
    128,894,697.60x = 193,342,046.40 × 71,563,804.80
  4. Step 4: Simplify right side
    128,894,697.60x = 13,836,292,468,202,142
  5. Step 5: Solve for x
    x = 13,836,292,468,202,142/128,894,697.60
  6. Step 6: Final answer
    x = 107,345,707.20

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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.