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Finding the Fourth Proportional to 172,988.60, 238,683.56 and 105,003.90

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Solution

The fourth proportional to 172,988.60, 238,683.56 and 105,003.90 is: 144,880.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,988.60 : 238,683.56 = 105,003.90 : x
  2. Step 2: Convert to fraction form
    172,988.60/238,683.56 = 105,003.90/x
  3. Step 3: Cross multiply
    172,988.60x = 238,683.56 × 105,003.90
  4. Step 4: Simplify right side
    172,988.60x = 25,062,704,140.86
  5. Step 5: Solve for x
    x = 25,062,704,140.86/172,988.60
  6. Step 6: Final answer
    x = 144,880.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.