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Finding the Fourth Proportional to 118,005.76, 162,861.06 and 72,674.80

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Solution

The fourth proportional to 118,005.76, 162,861.06 and 72,674.80 is: 100,299.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,005.76 : 162,861.06 = 72,674.80 : x
  2. Step 2: Convert to fraction form
    118,005.76/162,861.06 = 72,674.80/x
  3. Step 3: Cross multiply
    118,005.76x = 162,861.06 × 72,674.80
  4. Step 4: Simplify right side
    118,005.76x = 11,835,894,963.29
  5. Step 5: Solve for x
    x = 11,835,894,963.29/118,005.76
  6. Step 6: Final answer
    x = 100,299.30

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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.