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Finding the Fourth Proportional to 117,287.80, 175,931.70 and 28,540.60

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Solution

The fourth proportional to 117,287.80, 175,931.70 and 28,540.60 is: 42,810.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,287.80 : 175,931.70 = 28,540.60 : x
  2. Step 2: Convert to fraction form
    117,287.80/175,931.70 = 28,540.60/x
  3. Step 3: Cross multiply
    117,287.80x = 175,931.70 × 28,540.60
  4. Step 4: Simplify right side
    117,287.80x = 5,021,196,277.02
  5. Step 5: Solve for x
    x = 5,021,196,277.02/117,287.80
  6. Step 6: Final answer
    x = 42,810.90

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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.