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Finding the Fourth Proportional to 156,321.76, 215,723.28 and 84,701.74

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Solution

The fourth proportional to 156,321.76, 215,723.28 and 84,701.74 is: 116,888.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,321.76 : 215,723.28 = 84,701.74 : x
  2. Step 2: Convert to fraction form
    156,321.76/215,723.28 = 84,701.74/x
  3. Step 3: Cross multiply
    156,321.76x = 215,723.28 × 84,701.74
  4. Step 4: Simplify right side
    156,321.76x = 18,272,137,174.51
  5. Step 5: Solve for x
    x = 18,272,137,174.51/156,321.76
  6. Step 6: Final answer
    x = 116,888.00

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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.