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Finding the Fourth Proportional to 189,120.40, 260,984.49 and 103,079.39

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Solution

The fourth proportional to 189,120.40, 260,984.49 and 103,079.39 is: 142,248.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,120.40 : 260,984.49 = 103,079.39 : x
  2. Step 2: Convert to fraction form
    189,120.40/260,984.49 = 103,079.39/x
  3. Step 3: Cross multiply
    189,120.40x = 260,984.49 × 103,079.39
  4. Step 4: Simplify right side
    189,120.40x = 26,902,120,208.34
  5. Step 5: Solve for x
    x = 26,902,120,208.34/189,120.40
  6. Step 6: Final answer
    x = 142,248.64

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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.