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Finding the Fourth Proportional to 104,378.42, 156,428.21 and 54,353.63

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Solution

The fourth proportional to 104,378.42, 156,428.21 and 54,353.63 is: 81,457.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,378.42 : 156,428.21 = 54,353.63 : x
  2. Step 2: Convert to fraction form
    104,378.42/156,428.21 = 54,353.63/x
  3. Step 3: Cross multiply
    104,378.42x = 156,428.21 × 54,353.63
  4. Step 4: Simplify right side
    104,378.42x = 8,502,441,574.86
  5. Step 5: Solve for x
    x = 8,502,441,574.86/104,378.42
  6. Step 6: Final answer
    x = 81,457.85

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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.