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Finding the Fourth Proportional to 129,811.40, 181,998.40 and 129,811.40

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Solution

The fourth proportional to 129,811.40, 181,998.40 and 129,811.40 is: 181,998.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,811.40 : 181,998.40 = 129,811.40 : x
  2. Step 2: Convert to fraction form
    129,811.40/181,998.40 = 129,811.40/x
  3. Step 3: Cross multiply
    129,811.40x = 181,998.40 × 129,811.40
  4. Step 4: Simplify right side
    129,811.40x = 23,625,467,101.76
  5. Step 5: Solve for x
    x = 23,625,467,101.76/129,811.40
  6. Step 6: Final answer
    x = 181,998.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.