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Finding the Fourth Proportional to 118,747.20, 163,870.80 and 65,035.56

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Solution

The fourth proportional to 118,747.20, 163,870.80 and 65,035.56 is: 89,748.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,747.20 : 163,870.80 = 65,035.56 : x
  2. Step 2: Convert to fraction form
    118,747.20/163,870.80 = 65,035.56/x
  3. Step 3: Cross multiply
    118,747.20x = 163,870.80 × 65,035.56
  4. Step 4: Simplify right side
    118,747.20x = 10,657,429,245.65
  5. Step 5: Solve for x
    x = 10,657,429,245.65/118,747.20
  6. Step 6: Final answer
    x = 89,748.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.