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Finding the Fourth Proportional to 156,465.72, 215,783.34 and 122,873.40

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Solution

The fourth proportional to 156,465.72, 215,783.34 and 122,873.40 is: 169,455.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,465.72 : 215,783.34 = 122,873.40 : x
  2. Step 2: Convert to fraction form
    156,465.72/215,783.34 = 122,873.40/x
  3. Step 3: Cross multiply
    156,465.72x = 215,783.34 × 122,873.40
  4. Step 4: Simplify right side
    156,465.72x = 26,514,032,649.16
  5. Step 5: Solve for x
    x = 26,514,032,649.16/156,465.72
  6. Step 6: Final answer
    x = 169,455.86

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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.