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Finding the Fourth Proportional to 113,925.96, 170,728.47 and 87,168.39

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Solution

The fourth proportional to 113,925.96, 170,728.47 and 87,168.39 is: 130,629.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,925.96 : 170,728.47 = 87,168.39 : x
  2. Step 2: Convert to fraction form
    113,925.96/170,728.47 = 87,168.39/x
  3. Step 3: Cross multiply
    113,925.96x = 170,728.47 × 87,168.39
  4. Step 4: Simplify right side
    113,925.96x = 14,882,125,857.06
  5. Step 5: Solve for x
    x = 14,882,125,857.06/113,925.96
  6. Step 6: Final answer
    x = 130,629.80

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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.