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Finding the Fourth Proportional to 159,133.71, 219,605.18 and 87,518.27

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Solution

The fourth proportional to 159,133.71, 219,605.18 and 87,518.27 is: 120,775.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,133.71 : 219,605.18 = 87,518.27 : x
  2. Step 2: Convert to fraction form
    159,133.71/219,605.18 = 87,518.27/x
  3. Step 3: Cross multiply
    159,133.71x = 219,605.18 × 87,518.27
  4. Step 4: Simplify right side
    159,133.71x = 19,219,465,548.06
  5. Step 5: Solve for x
    x = 19,219,465,548.06/159,133.71
  6. Step 6: Final answer
    x = 120,775.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.