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Finding the Fourth Proportional to 159,319.34, 219,860.64 and 87,699

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Solution

The fourth proportional to 159,319.34, 219,860.64 and 87,699 is: 121,024.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,319.34 : 219,860.64 = 87,699 : x
  2. Step 2: Convert to fraction form
    159,319.34/219,860.64 = 87,699/x
  3. Step 3: Cross multiply
    159,319.34x = 219,860.64 × 87,699
  4. Step 4: Simplify right side
    159,319.34x = 19,281,558,267.36
  5. Step 5: Solve for x
    x = 19,281,558,267.36/159,319.34
  6. Step 6: Final answer
    x = 121,024.59

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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.