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Finding the Fourth Proportional to 121,632.40, 182,405.40 and 84,192.40

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Solution

The fourth proportional to 121,632.40, 182,405.40 and 84,192.40 is: 126,258.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,632.40 : 182,405.40 = 84,192.40 : x
  2. Step 2: Convert to fraction form
    121,632.40/182,405.40 = 84,192.40/x
  3. Step 3: Cross multiply
    121,632.40x = 182,405.40 × 84,192.40
  4. Step 4: Simplify right side
    121,632.40x = 15,357,148,398.96
  5. Step 5: Solve for x
    x = 15,357,148,398.96/121,632.40
  6. Step 6: Final answer
    x = 126,258.70

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1.5x scale

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.