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Finding the Fourth Proportional to 118,045.55, 177,068.33 and 78,474.35

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Solution

The fourth proportional to 118,045.55, 177,068.33 and 78,474.35 is: 117,711.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,045.55 : 177,068.33 = 78,474.35 : x
  2. Step 2: Convert to fraction form
    118,045.55/177,068.33 = 78,474.35/x
  3. Step 3: Cross multiply
    118,045.55x = 177,068.33 × 78,474.35
  4. Step 4: Simplify right side
    118,045.55x = 13,895,321,709.96
  5. Step 5: Solve for x
    x = 13,895,321,709.96/118,045.55
  6. Step 6: Final answer
    x = 117,711.53

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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.