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Finding the Fourth Proportional to 143,611.80, 215,514.90 and 64,685.40

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Solution

The fourth proportional to 143,611.80, 215,514.90 and 64,685.40 is: 97,071.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,611.80 : 215,514.90 = 64,685.40 : x
  2. Step 2: Convert to fraction form
    143,611.80/215,514.90 = 64,685.40/x
  3. Step 3: Cross multiply
    143,611.80x = 215,514.90 × 64,685.40
  4. Step 4: Simplify right side
    143,611.80x = 13,940,667,512.46
  5. Step 5: Solve for x
    x = 13,940,667,512.46/143,611.80
  6. Step 6: Final answer
    x = 97,071.88

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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.