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Finding the Fourth Proportional to 156,174.72, 215,520.80 and 84,554.80

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Solution

The fourth proportional to 156,174.72, 215,520.80 and 84,554.80 is: 116,685.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,174.72 : 215,520.80 = 84,554.80 : x
  2. Step 2: Convert to fraction form
    156,174.72/215,520.80 = 84,554.80/x
  3. Step 3: Cross multiply
    156,174.72x = 215,520.80 × 84,554.80
  4. Step 4: Simplify right side
    156,174.72x = 18,223,318,139.84
  5. Step 5: Solve for x
    x = 18,223,318,139.84/156,174.72
  6. Step 6: Final answer
    x = 116,685.45

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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.