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Finding the Fourth Proportional to 219,115, 302,378.73 and 118,513

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Solution

The fourth proportional to 219,115, 302,378.73 and 118,513 is: 163,547.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,115 : 302,378.73 = 118,513 : x
  2. Step 2: Convert to fraction form
    219,115/302,378.73 = 118,513/x
  3. Step 3: Cross multiply
    219,115x = 302,378.73 × 118,513
  4. Step 4: Simplify right side
    219,115x = 35,835,810,428.49
  5. Step 5: Solve for x
    x = 35,835,810,428.49/219,115
  6. Step 6: Final answer
    x = 163,547.96

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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.