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Finding the Fourth Proportional to 118,047.20, 176,955.60 and 105,605.60

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Solution

The fourth proportional to 118,047.20, 176,955.60 and 105,605.60 is: 158,305.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,047.20 : 176,955.60 = 105,605.60 : x
  2. Step 2: Convert to fraction form
    118,047.20/176,955.60 = 105,605.60/x
  3. Step 3: Cross multiply
    118,047.20x = 176,955.60 × 105,605.60
  4. Step 4: Simplify right side
    118,047.20x = 18,687,502,311.36
  5. Step 5: Solve for x
    x = 18,687,502,311.36/118,047.20
  6. Step 6: Final answer
    x = 158,305.34

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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.