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Finding the Fourth Proportional to 189,204.80, 260,965.40 and 128,667.84

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Solution

The fourth proportional to 189,204.80, 260,965.40 and 128,667.84 is: 177,468.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,204.80 : 260,965.40 = 128,667.84 : x
  2. Step 2: Convert to fraction form
    189,204.80/260,965.40 = 128,667.84/x
  3. Step 3: Cross multiply
    189,204.80x = 260,965.40 × 128,667.84
  4. Step 4: Simplify right side
    189,204.80x = 33,577,854,332.74
  5. Step 5: Solve for x
    x = 33,577,854,332.74/189,204.80
  6. Step 6: Final answer
    x = 177,468.30

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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.