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Finding the Fourth Proportional to 89,878.60, 134,904.30 and 45,555.40

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Solution

The fourth proportional to 89,878.60, 134,904.30 and 45,555.40 is: 68,376.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,878.60 : 134,904.30 = 45,555.40 : x
  2. Step 2: Convert to fraction form
    89,878.60/134,904.30 = 45,555.40/x
  3. Step 3: Cross multiply
    89,878.60x = 134,904.30 × 45,555.40
  4. Step 4: Simplify right side
    89,878.60x = 6,145,619,348.22
  5. Step 5: Solve for x
    x = 6,145,619,348.22/89,878.60
  6. Step 6: Final answer
    x = 68,376.89

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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.