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Finding the Fourth Proportional to 78,901.80, 118,352.70 and 49,410.60

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Solution

The fourth proportional to 78,901.80, 118,352.70 and 49,410.60 is: 74,115.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,901.80 : 118,352.70 = 49,410.60 : x
  2. Step 2: Convert to fraction form
    78,901.80/118,352.70 = 49,410.60/x
  3. Step 3: Cross multiply
    78,901.80x = 118,352.70 × 49,410.60
  4. Step 4: Simplify right side
    78,901.80x = 5,847,877,918.62
  5. Step 5: Solve for x
    x = 5,847,877,918.62/78,901.80
  6. Step 6: Final answer
    x = 74,115.90

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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.