Home / 129,557.60-178,872.04-105,741.12

Finding the Fourth Proportional to 129,557.60, 178,872.04 and 105,741.12

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Solution

The fourth proportional to 129,557.60, 178,872.04 and 105,741.12 is: 145,990.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,557.60 : 178,872.04 = 105,741.12 : x
  2. Step 2: Convert to fraction form
    129,557.60/178,872.04 = 105,741.12/x
  3. Step 3: Cross multiply
    129,557.60x = 178,872.04 × 105,741.12
  4. Step 4: Simplify right side
    129,557.60x = 18,914,129,846.28
  5. Step 5: Solve for x
    x = 18,914,129,846.28/129,557.60
  6. Step 6: Final answer
    x = 145,990.12

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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.