Home / 128,672,890.80-177,570,387.60-69,935,538.30

Finding the Fourth Proportional to 128,672,890.80, 177,570,387.60 and 69,935,538.30

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Solution

The fourth proportional to 128,672,890.80, 177,570,387.60 and 69,935,538.30 is: 96,512,020.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,672,890.80 : 177,570,387.60 = 69,935,538.30 : x
  2. Step 2: Convert to fraction form
    128,672,890.80/177,570,387.60 = 69,935,538.30/x
  3. Step 3: Cross multiply
    128,672,890.80x = 177,570,387.60 × 69,935,538.30
  4. Step 4: Simplify right side
    128,672,890.80x = 12,418,480,642,945,644
  5. Step 5: Solve for x
    x = 12,418,480,642,945,644/128,672,890.80
  6. Step 6: Final answer
    x = 96,512,020.25

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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.