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Finding the Fourth Proportional to 90,813, 136,219.57 and 43,416.91

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Solution

The fourth proportional to 90,813, 136,219.57 and 43,416.91 is: 65,125.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,813 : 136,219.57 = 43,416.91 : x
  2. Step 2: Convert to fraction form
    90,813/136,219.57 = 43,416.91/x
  3. Step 3: Cross multiply
    90,813x = 136,219.57 × 43,416.91
  4. Step 4: Simplify right side
    90,813x = 5,914,232,810.93
  5. Step 5: Solve for x
    x = 5,914,232,810.93/90,813
  6. Step 6: Final answer
    x = 65,125.40

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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.