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Finding the Fourth Proportional to 188,683.40, 260,378.84 and 108,158.40

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Solution

The fourth proportional to 188,683.40, 260,378.84 and 108,158.40 is: 149,256.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,683.40 : 260,378.84 = 108,158.40 : x
  2. Step 2: Convert to fraction form
    188,683.40/260,378.84 = 108,158.40/x
  3. Step 3: Cross multiply
    188,683.40x = 260,378.84 × 108,158.40
  4. Step 4: Simplify right side
    188,683.40x = 28,162,158,728.26
  5. Step 5: Solve for x
    x = 28,162,158,728.26/188,683.40
  6. Step 6: Final answer
    x = 149,256.15

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1.5x scale

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.