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Finding the Fourth Proportional to 118,374.50, 177,646.70 and 80,328.90

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Solution

The fourth proportional to 118,374.50, 177,646.70 and 80,328.90 is: 120,551.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,374.50 : 177,646.70 = 80,328.90 : x
  2. Step 2: Convert to fraction form
    118,374.50/177,646.70 = 80,328.90/x
  3. Step 3: Cross multiply
    118,374.50x = 177,646.70 × 80,328.90
  4. Step 4: Simplify right side
    118,374.50x = 14,270,163,999.63
  5. Step 5: Solve for x
    x = 14,270,163,999.63/118,374.50
  6. Step 6: Final answer
    x = 120,551.00

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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.