Home / 90,428,540.40-135,642,810.60-89,672,713.20

Finding the Fourth Proportional to 90,428,540.40, 135,642,810.60 and 89,672,713.20

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Solution

The fourth proportional to 90,428,540.40, 135,642,810.60 and 89,672,713.20 is: 134,509,069.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,428,540.40 : 135,642,810.60 = 89,672,713.20 : x
  2. Step 2: Convert to fraction form
    90,428,540.40/135,642,810.60 = 89,672,713.20/x
  3. Step 3: Cross multiply
    90,428,540.40x = 135,642,810.60 × 89,672,713.20
  4. Step 4: Simplify right side
    90,428,540.40x = 12,163,458,852,575,720
  5. Step 5: Solve for x
    x = 12,163,458,852,575,720/90,428,540.40
  6. Step 6: Final answer
    x = 134,509,069.80

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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.