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Finding the Fourth Proportional to 118,389.20, 177,583.80 and 81,064.40

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Solution

The fourth proportional to 118,389.20, 177,583.80 and 81,064.40 is: 121,596.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,389.20 : 177,583.80 = 81,064.40 : x
  2. Step 2: Convert to fraction form
    118,389.20/177,583.80 = 81,064.40/x
  3. Step 3: Cross multiply
    118,389.20x = 177,583.80 × 81,064.40
  4. Step 4: Simplify right side
    118,389.20x = 14,395,724,196.72
  5. Step 5: Solve for x
    x = 14,395,724,196.72/118,389.20
  6. Step 6: Final answer
    x = 121,596.60

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1.5x scale

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.