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Finding the Fourth Proportional to 58,157.68, 87,218.16 and 18,706

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Solution

The fourth proportional to 58,157.68, 87,218.16 and 18,706 is: 28,053.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,157.68 : 87,218.16 = 18,706 : x
  2. Step 2: Convert to fraction form
    58,157.68/87,218.16 = 18,706/x
  3. Step 3: Cross multiply
    58,157.68x = 87,218.16 × 18,706
  4. Step 4: Simplify right side
    58,157.68x = 1,631,502,900.96
  5. Step 5: Solve for x
    x = 1,631,502,900.96/58,157.68
  6. Step 6: Final answer
    x = 28,053.09

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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.