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Finding the Fourth Proportional to 89,563.60, 134,431.80 and 45,240.40

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Solution

The fourth proportional to 89,563.60, 134,431.80 and 45,240.40 is: 67,904.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,563.60 : 134,431.80 = 45,240.40 : x
  2. Step 2: Convert to fraction form
    89,563.60/134,431.80 = 45,240.40/x
  3. Step 3: Cross multiply
    89,563.60x = 134,431.80 × 45,240.40
  4. Step 4: Simplify right side
    89,563.60x = 6,081,748,404.72
  5. Step 5: Solve for x
    x = 6,081,748,404.72/89,563.60
  6. Step 6: Final answer
    x = 67,904.24

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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.