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Finding the Fourth Proportional to 117,147.60, 175,721.40 and 85,813.20

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Solution

The fourth proportional to 117,147.60, 175,721.40 and 85,813.20 is: 128,719.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,147.60 : 175,721.40 = 85,813.20 : x
  2. Step 2: Convert to fraction form
    117,147.60/175,721.40 = 85,813.20/x
  3. Step 3: Cross multiply
    117,147.60x = 175,721.40 × 85,813.20
  4. Step 4: Simplify right side
    117,147.60x = 15,079,215,642.48
  5. Step 5: Solve for x
    x = 15,079,215,642.48/117,147.60
  6. Step 6: Final answer
    x = 128,719.80

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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.