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Finding the Fourth Proportional to 164,878.20, 247,317.30 and 142,327.80

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Solution

The fourth proportional to 164,878.20, 247,317.30 and 142,327.80 is: 213,491.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,878.20 : 247,317.30 = 142,327.80 : x
  2. Step 2: Convert to fraction form
    164,878.20/247,317.30 = 142,327.80/x
  3. Step 3: Cross multiply
    164,878.20x = 247,317.30 × 142,327.80
  4. Step 4: Simplify right side
    164,878.20x = 35,200,127,210.94
  5. Step 5: Solve for x
    x = 35,200,127,210.94/164,878.20
  6. Step 6: Final answer
    x = 213,491.70

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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.