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Finding the Fourth Proportional to 85,451,615.01, 128,177,424.03 and 20,754,984.07

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Solution

The fourth proportional to 85,451,615.01, 128,177,424.03 and 20,754,984.07 is: 31,132,476.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,451,615.01 : 128,177,424.03 = 20,754,984.07 : x
  2. Step 2: Convert to fraction form
    85,451,615.01/128,177,424.03 = 20,754,984.07/x
  3. Step 3: Cross multiply
    85,451,615.01x = 128,177,424.03 × 20,754,984.07
  4. Step 4: Simplify right side
    85,451,615.01x = 2,660,320,394,114,338
  5. Step 5: Solve for x
    x = 2,660,320,394,114,338/85,451,615.01
  6. Step 6: Final answer
    x = 31,132,476.48

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1.5x scale

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.