Home / 129,360.13-178,516.93-72,771.50

Finding the Fourth Proportional to 129,360.13, 178,516.93 and 72,771.50

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Solution

The fourth proportional to 129,360.13, 178,516.93 and 72,771.50 is: 100,424.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,360.13 : 178,516.93 = 72,771.50 : x
  2. Step 2: Convert to fraction form
    129,360.13/178,516.93 = 72,771.50/x
  3. Step 3: Cross multiply
    129,360.13x = 178,516.93 × 72,771.50
  4. Step 4: Simplify right side
    129,360.13x = 12,990,944,771.50
  5. Step 5: Solve for x
    x = 12,990,944,771.50/129,360.13
  6. Step 6: Final answer
    x = 100,424.64

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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.