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Finding the Fourth Proportional to 159,085.89, 219,532.88 and 87,465.36

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Solution

The fourth proportional to 159,085.89, 219,532.88 and 87,465.36 is: 120,699.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,085.89 : 219,532.88 = 87,465.36 : x
  2. Step 2: Convert to fraction form
    159,085.89/219,532.88 = 87,465.36/x
  3. Step 3: Cross multiply
    159,085.89x = 219,532.88 × 87,465.36
  4. Step 4: Simplify right side
    159,085.89x = 19,201,521,943.71
  5. Step 5: Solve for x
    x = 19,201,521,943.71/159,085.89
  6. Step 6: Final answer
    x = 120,699.09

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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.