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Finding the Fourth Proportional to 78,542.60, 117,813.90 and 48,649.05

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Solution

The fourth proportional to 78,542.60, 117,813.90 and 48,649.05 is: 72,973.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,542.60 : 117,813.90 = 48,649.05 : x
  2. Step 2: Convert to fraction form
    78,542.60/117,813.90 = 48,649.05/x
  3. Step 3: Cross multiply
    78,542.60x = 117,813.90 × 48,649.05
  4. Step 4: Simplify right side
    78,542.60x = 5,731,534,311.80
  5. Step 5: Solve for x
    x = 5,731,534,311.80/78,542.60
  6. Step 6: Final answer
    x = 72,973.58

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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.