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Finding the Fourth Proportional to 129,612.30, 181,982.10 and 129,612.30

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Solution

The fourth proportional to 129,612.30, 181,982.10 and 129,612.30 is: 181,982.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,612.30 : 181,982.10 = 129,612.30 : x
  2. Step 2: Convert to fraction form
    129,612.30/181,982.10 = 129,612.30/x
  3. Step 3: Cross multiply
    129,612.30x = 181,982.10 × 129,612.30
  4. Step 4: Simplify right side
    129,612.30x = 23,587,118,539.83
  5. Step 5: Solve for x
    x = 23,587,118,539.83/129,612.30
  6. Step 6: Final answer
    x = 181,982.10

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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.