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Finding the Fourth Proportional to 104,212.80, 156,088.80 and 80,654.40

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Solution

The fourth proportional to 104,212.80, 156,088.80 and 80,654.40 is: 120,803.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,212.80 : 156,088.80 = 80,654.40 : x
  2. Step 2: Convert to fraction form
    104,212.80/156,088.80 = 80,654.40/x
  3. Step 3: Cross multiply
    104,212.80x = 156,088.80 × 80,654.40
  4. Step 4: Simplify right side
    104,212.80x = 12,589,248,510.72
  5. Step 5: Solve for x
    x = 12,589,248,510.72/104,212.80
  6. Step 6: Final answer
    x = 120,803.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.