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Finding the Fourth Proportional to 79,085.80, 118,628.70 and 61,460.20

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Solution

The fourth proportional to 79,085.80, 118,628.70 and 61,460.20 is: 92,190.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,085.80 : 118,628.70 = 61,460.20 : x
  2. Step 2: Convert to fraction form
    79,085.80/118,628.70 = 61,460.20/x
  3. Step 3: Cross multiply
    79,085.80x = 118,628.70 × 61,460.20
  4. Step 4: Simplify right side
    79,085.80x = 7,290,943,627.74
  5. Step 5: Solve for x
    x = 7,290,943,627.74/79,085.80
  6. Step 6: Final answer
    x = 92,190.30

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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.