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Finding the Fourth Proportional to 156,305.70, 215,700.17 and 84,681.45

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Solution

The fourth proportional to 156,305.70, 215,700.17 and 84,681.45 is: 116,859.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,305.70 : 215,700.17 = 84,681.45 : x
  2. Step 2: Convert to fraction form
    156,305.70/215,700.17 = 84,681.45/x
  3. Step 3: Cross multiply
    156,305.70x = 215,700.17 × 84,681.45
  4. Step 4: Simplify right side
    156,305.70x = 18,265,802,737.44
  5. Step 5: Solve for x
    x = 18,265,802,737.44/156,305.70
  6. Step 6: Final answer
    x = 116,859.48

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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.