Home / 90,428,462.20-135,642,693.30-86,271,412.60

Finding the Fourth Proportional to 90,428,462.20, 135,642,693.30 and 86,271,412.60

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Solution

The fourth proportional to 90,428,462.20, 135,642,693.30 and 86,271,412.60 is: 129,407,118.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,428,462.20 : 135,642,693.30 = 86,271,412.60 : x
  2. Step 2: Convert to fraction form
    90,428,462.20/135,642,693.30 = 86,271,412.60/x
  3. Step 3: Cross multiply
    90,428,462.20x = 135,642,693.30 × 86,271,412.60
  4. Step 4: Simplify right side
    90,428,462.20x = 11,702,086,759,859,556
  5. Step 5: Solve for x
    x = 11,702,086,759,859,556/90,428,462.20
  6. Step 6: Final answer
    x = 129,407,118.90

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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.