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Finding the Fourth Proportional to 90,134.58, 135,004.80 and 45,685.02

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Solution

The fourth proportional to 90,134.58, 135,004.80 and 45,685.02 is: 68,427.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,134.58 : 135,004.80 = 45,685.02 : x
  2. Step 2: Convert to fraction form
    90,134.58/135,004.80 = 45,685.02/x
  3. Step 3: Cross multiply
    90,134.58x = 135,004.80 × 45,685.02
  4. Step 4: Simplify right side
    90,134.58x = 6,167,696,988.10
  5. Step 5: Solve for x
    x = 6,167,696,988.10/90,134.58
  6. Step 6: Final answer
    x = 68,427.64

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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.