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Finding the Fourth Proportional to 156,479.40, 215,941.14 and 84,859.20

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Solution

The fourth proportional to 156,479.40, 215,941.14 and 84,859.20 is: 117,105.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,479.40 : 215,941.14 = 84,859.20 : x
  2. Step 2: Convert to fraction form
    156,479.40/215,941.14 = 84,859.20/x
  3. Step 3: Cross multiply
    156,479.40x = 215,941.14 × 84,859.20
  4. Step 4: Simplify right side
    156,479.40x = 18,324,592,387.49
  5. Step 5: Solve for x
    x = 18,324,592,387.49/156,479.40
  6. Step 6: Final answer
    x = 117,105.46

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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.