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Finding the Fourth Proportional to 118,540.20, 177,810.30 and 74,303.40

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Solution

The fourth proportional to 118,540.20, 177,810.30 and 74,303.40 is: 111,455.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,540.20 : 177,810.30 = 74,303.40 : x
  2. Step 2: Convert to fraction form
    118,540.20/177,810.30 = 74,303.40/x
  3. Step 3: Cross multiply
    118,540.20x = 177,810.30 × 74,303.40
  4. Step 4: Simplify right side
    118,540.20x = 13,211,909,845.02
  5. Step 5: Solve for x
    x = 13,211,909,845.02/118,540.20
  6. Step 6: Final answer
    x = 111,455.10

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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.