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Finding the Fourth Proportional to 78,870.40, 118,305.60 and 47,766.40

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Solution

The fourth proportional to 78,870.40, 118,305.60 and 47,766.40 is: 71,649.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,870.40 : 118,305.60 = 47,766.40 : x
  2. Step 2: Convert to fraction form
    78,870.40/118,305.60 = 47,766.40/x
  3. Step 3: Cross multiply
    78,870.40x = 118,305.60 × 47,766.40
  4. Step 4: Simplify right side
    78,870.40x = 5,651,032,611.84
  5. Step 5: Solve for x
    x = 5,651,032,611.84/78,870.40
  6. Step 6: Final answer
    x = 71,649.60

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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.