Home / 143,935.60-215,611.80-81,533.20

Finding the Fourth Proportional to 143,935.60, 215,611.80 and 81,533.20

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Solution

The fourth proportional to 143,935.60, 215,611.80 and 81,533.20 is: 122,134.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,935.60 : 215,611.80 = 81,533.20 : x
  2. Step 2: Convert to fraction form
    143,935.60/215,611.80 = 81,533.20/x
  3. Step 3: Cross multiply
    143,935.60x = 215,611.80 × 81,533.20
  4. Step 4: Simplify right side
    143,935.60x = 17,579,520,011.76
  5. Step 5: Solve for x
    x = 17,579,520,011.76/143,935.60
  6. Step 6: Final answer
    x = 122,134.62

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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.