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Finding the Fourth Proportional to 146,543.80, 219,815.70 and 86,668.60

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Solution

The fourth proportional to 146,543.80, 219,815.70 and 86,668.60 is: 130,002.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,543.80 : 219,815.70 = 86,668.60 : x
  2. Step 2: Convert to fraction form
    146,543.80/219,815.70 = 86,668.60/x
  3. Step 3: Cross multiply
    146,543.80x = 219,815.70 × 86,668.60
  4. Step 4: Simplify right side
    146,543.80x = 19,051,118,977.02
  5. Step 5: Solve for x
    x = 19,051,118,977.02/146,543.80
  6. Step 6: Final answer
    x = 130,002.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.