Home / 129,072.96-178,124.67-72,485.55

Finding the Fourth Proportional to 129,072.96, 178,124.67 and 72,485.55

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Solution

The fourth proportional to 129,072.96, 178,124.67 and 72,485.55 is: 100,032.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,072.96 : 178,124.67 = 72,485.55 : x
  2. Step 2: Convert to fraction form
    129,072.96/178,124.67 = 72,485.55/x
  3. Step 3: Cross multiply
    129,072.96x = 178,124.67 × 72,485.55
  4. Step 4: Simplify right side
    129,072.96x = 12,911,464,673.52
  5. Step 5: Solve for x
    x = 12,911,464,673.52/129,072.96
  6. Step 6: Final answer
    x = 100,032.30

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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.