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Finding the Fourth Proportional to 156,051.40, 215,350.94 and 84,431.40

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Solution

The fourth proportional to 156,051.40, 215,350.94 and 84,431.40 is: 116,515.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,051.40 : 215,350.94 = 84,431.40 : x
  2. Step 2: Convert to fraction form
    156,051.40/215,350.94 = 84,431.40/x
  3. Step 3: Cross multiply
    156,051.40x = 215,350.94 × 84,431.40
  4. Step 4: Simplify right side
    156,051.40x = 18,182,381,355.52
  5. Step 5: Solve for x
    x = 18,182,381,355.52/156,051.40
  6. Step 6: Final answer
    x = 116,515.34

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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.