Home / 128,862,620.70-177,830,445.60-70,915,868.70

Finding the Fourth Proportional to 128,862,620.70, 177,830,445.60 and 70,915,868.70

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Solution

The fourth proportional to 128,862,620.70, 177,830,445.60 and 70,915,868.70 is: 97,863,914.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,862,620.70 : 177,830,445.60 = 70,915,868.70 : x
  2. Step 2: Convert to fraction form
    128,862,620.70/177,830,445.60 = 70,915,868.70/x
  3. Step 3: Cross multiply
    128,862,620.70x = 177,830,445.60 × 70,915,868.70
  4. Step 4: Simplify right side
    128,862,620.70x = 12,611,000,531,032,092
  5. Step 5: Solve for x
    x = 12,611,000,531,032,092/128,862,620.70
  6. Step 6: Final answer
    x = 97,863,914.78

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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.