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Finding the Fourth Proportional to 117,153.60, 175,730.40 and 85,819.20

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Solution

The fourth proportional to 117,153.60, 175,730.40 and 85,819.20 is: 128,728.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,153.60 : 175,730.40 = 85,819.20 : x
  2. Step 2: Convert to fraction form
    117,153.60/175,730.40 = 85,819.20/x
  3. Step 3: Cross multiply
    117,153.60x = 175,730.40 × 85,819.20
  4. Step 4: Simplify right side
    117,153.60x = 15,081,042,343.68
  5. Step 5: Solve for x
    x = 15,081,042,343.68/117,153.60
  6. Step 6: Final answer
    x = 128,728.80

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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.