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Finding the Fourth Proportional to 156,410.40, 215,846.64 and 84,790.20

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Solution

The fourth proportional to 156,410.40, 215,846.64 and 84,790.20 is: 117,010.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,410.40 : 215,846.64 = 84,790.20 : x
  2. Step 2: Convert to fraction form
    156,410.40/215,846.64 = 84,790.20/x
  3. Step 3: Cross multiply
    156,410.40x = 215,846.64 × 84,790.20
  4. Step 4: Simplify right side
    156,410.40x = 18,301,679,774.93
  5. Step 5: Solve for x
    x = 18,301,679,774.93/156,410.40
  6. Step 6: Final answer
    x = 117,010.63

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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.