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Finding the Fourth Proportional to 104,987.80, 157,481.70 and 65,621.80

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Solution

The fourth proportional to 104,987.80, 157,481.70 and 65,621.80 is: 98,432.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,987.80 : 157,481.70 = 65,621.80 : x
  2. Step 2: Convert to fraction form
    104,987.80/157,481.70 = 65,621.80/x
  3. Step 3: Cross multiply
    104,987.80x = 157,481.70 × 65,621.80
  4. Step 4: Simplify right side
    104,987.80x = 10,334,232,621.06
  5. Step 5: Solve for x
    x = 10,334,232,621.06/104,987.80
  6. Step 6: Final answer
    x = 98,432.70

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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.