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Finding the Fourth Proportional to 143,903.73, 215,818.74 and 42,678.09

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Solution

The fourth proportional to 143,903.73, 215,818.74 and 42,678.09 is: 64,006.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,903.73 : 215,818.74 = 42,678.09 : x
  2. Step 2: Convert to fraction form
    143,903.73/215,818.74 = 42,678.09/x
  3. Step 3: Cross multiply
    143,903.73x = 215,818.74 × 42,678.09
  4. Step 4: Simplify right side
    143,903.73x = 9,210,731,609.41
  5. Step 5: Solve for x
    x = 9,210,731,609.41/143,903.73
  6. Step 6: Final answer
    x = 64,006.20

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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.