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Finding the Fourth Proportional to 118,045.80, 177,068.70 and 78,474.60

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Solution

The fourth proportional to 118,045.80, 177,068.70 and 78,474.60 is: 117,711.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,045.80 : 177,068.70 = 78,474.60 : x
  2. Step 2: Convert to fraction form
    118,045.80/177,068.70 = 78,474.60/x
  3. Step 3: Cross multiply
    118,045.80x = 177,068.70 × 78,474.60
  4. Step 4: Simplify right side
    118,045.80x = 13,895,395,405.02
  5. Step 5: Solve for x
    x = 13,895,395,405.02/118,045.80
  6. Step 6: Final answer
    x = 117,711.90

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1.5x scale

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.