Home / 129,258.85-178,377.20-72,670.63

Finding the Fourth Proportional to 129,258.85, 178,377.20 and 72,670.63

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Solution

The fourth proportional to 129,258.85, 178,377.20 and 72,670.63 is: 100,285.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,258.85 : 178,377.20 = 72,670.63 : x
  2. Step 2: Convert to fraction form
    129,258.85/178,377.20 = 72,670.63/x
  3. Step 3: Cross multiply
    129,258.85x = 178,377.20 × 72,670.63
  4. Step 4: Simplify right side
    129,258.85x = 12,962,783,501.64
  5. Step 5: Solve for x
    x = 12,962,783,501.64/129,258.85
  6. Step 6: Final answer
    x = 100,285.46

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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.