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Finding the Fourth Proportional to 85,612.60, 128,418.90 and 23,283.10

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Solution

The fourth proportional to 85,612.60, 128,418.90 and 23,283.10 is: 34,924.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,612.60 : 128,418.90 = 23,283.10 : x
  2. Step 2: Convert to fraction form
    85,612.60/128,418.90 = 23,283.10/x
  3. Step 3: Cross multiply
    85,612.60x = 128,418.90 × 23,283.10
  4. Step 4: Simplify right side
    85,612.60x = 2,989,990,090.59
  5. Step 5: Solve for x
    x = 2,989,990,090.59/85,612.60
  6. Step 6: Final answer
    x = 34,924.65

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Similar ratio
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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.