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Finding the Fourth Proportional to 143,611.60, 215,460.60 and 77,083.60

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Solution

The fourth proportional to 143,611.60, 215,460.60 and 77,083.60 is: 115,648.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,611.60 : 215,460.60 = 77,083.60 : x
  2. Step 2: Convert to fraction form
    143,611.60/215,460.60 = 77,083.60/x
  3. Step 3: Cross multiply
    143,611.60x = 215,460.60 × 77,083.60
  4. Step 4: Simplify right side
    143,611.60x = 16,608,478,706.16
  5. Step 5: Solve for x
    x = 16,608,478,706.16/143,611.60
  6. Step 6: Final answer
    x = 115,648.59

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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.