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Finding the Fourth Proportional to 219,390, 302,758.20 and 118,788

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Solution

The fourth proportional to 219,390, 302,758.20 and 118,788 is: 163,927.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,390 : 302,758.20 = 118,788 : x
  2. Step 2: Convert to fraction form
    219,390/302,758.20 = 118,788/x
  3. Step 3: Cross multiply
    219,390x = 302,758.20 × 118,788
  4. Step 4: Simplify right side
    219,390x = 35,964,041,061.60
  5. Step 5: Solve for x
    x = 35,964,041,061.60/219,390
  6. Step 6: Final answer
    x = 163,927.44

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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.