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Finding the Fourth Proportional to 118,209.70, 177,314.55 and 48,139.30

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Solution

The fourth proportional to 118,209.70, 177,314.55 and 48,139.30 is: 72,208.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,209.70 : 177,314.55 = 48,139.30 : x
  2. Step 2: Convert to fraction form
    118,209.70/177,314.55 = 48,139.30/x
  3. Step 3: Cross multiply
    118,209.70x = 177,314.55 × 48,139.30
  4. Step 4: Simplify right side
    118,209.70x = 8,535,798,316.82
  5. Step 5: Solve for x
    x = 8,535,798,316.82/118,209.70
  6. Step 6: Final answer
    x = 72,208.95

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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.