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Finding the Fourth Proportional to 129,179.34, 178,283.88 and 72,590.67

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Solution

The fourth proportional to 129,179.34, 178,283.88 and 72,590.67 is: 100,184.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,179.34 : 178,283.88 = 72,590.67 : x
  2. Step 2: Convert to fraction form
    129,179.34/178,283.88 = 72,590.67/x
  3. Step 3: Cross multiply
    129,179.34x = 178,283.88 × 72,590.67
  4. Step 4: Simplify right side
    129,179.34x = 12,941,746,299.40
  5. Step 5: Solve for x
    x = 12,941,746,299.40/129,179.34
  6. Step 6: Final answer
    x = 100,184.34

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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.