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Finding the Fourth Proportional to 78,890.80, 118,336.20 and 75,002.80

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Solution

The fourth proportional to 78,890.80, 118,336.20 and 75,002.80 is: 112,504.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,890.80 : 118,336.20 = 75,002.80 : x
  2. Step 2: Convert to fraction form
    78,890.80/118,336.20 = 75,002.80/x
  3. Step 3: Cross multiply
    78,890.80x = 118,336.20 × 75,002.80
  4. Step 4: Simplify right side
    78,890.80x = 8,875,546,341.36
  5. Step 5: Solve for x
    x = 8,875,546,341.36/78,890.80
  6. Step 6: Final answer
    x = 112,504.20

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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.