Home / 129,072.42-178,135.20-72,483.66

Finding the Fourth Proportional to 129,072.42, 178,135.20 and 72,483.66

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Solution

The fourth proportional to 129,072.42, 178,135.20 and 72,483.66 is: 100,036.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,072.42 : 178,135.20 = 72,483.66 : x
  2. Step 2: Convert to fraction form
    129,072.42/178,135.20 = 72,483.66/x
  3. Step 3: Cross multiply
    129,072.42x = 178,135.20 × 72,483.66
  4. Step 4: Simplify right side
    129,072.42x = 12,911,891,270.83
  5. Step 5: Solve for x
    x = 12,911,891,270.83/129,072.42
  6. Step 6: Final answer
    x = 100,036.02

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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.