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Finding the Fourth Proportional to 171,913.70, 257,870.55 and 108,928.10

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Solution

The fourth proportional to 171,913.70, 257,870.55 and 108,928.10 is: 163,392.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,913.70 : 257,870.55 = 108,928.10 : x
  2. Step 2: Convert to fraction form
    171,913.70/257,870.55 = 108,928.10/x
  3. Step 3: Cross multiply
    171,913.70x = 257,870.55 × 108,928.10
  4. Step 4: Simplify right side
    171,913.70x = 28,089,349,057.46
  5. Step 5: Solve for x
    x = 28,089,349,057.46/171,913.70
  6. Step 6: Final answer
    x = 163,392.15

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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.