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Finding the Fourth Proportional to 90,319.63, 135,483.77 and 43,611.79

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Solution

The fourth proportional to 90,319.63, 135,483.77 and 43,611.79 is: 65,419.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,319.63 : 135,483.77 = 43,611.79 : x
  2. Step 2: Convert to fraction form
    90,319.63/135,483.77 = 43,611.79/x
  3. Step 3: Cross multiply
    90,319.63x = 135,483.77 × 43,611.79
  4. Step 4: Simplify right side
    90,319.63x = 5,908,689,725.65
  5. Step 5: Solve for x
    x = 5,908,689,725.65/90,319.63
  6. Step 6: Final answer
    x = 65,419.77

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1.5x scale

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.