Home / 156,402.90-215,836.29-84,782.70

Finding the Fourth Proportional to 156,402.90, 215,836.29 and 84,782.70

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Solution

The fourth proportional to 156,402.90, 215,836.29 and 84,782.70 is: 117,000.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,402.90 : 215,836.29 = 84,782.70 : x
  2. Step 2: Convert to fraction form
    156,402.90/215,836.29 = 84,782.70/x
  3. Step 3: Cross multiply
    156,402.90x = 215,836.29 × 84,782.70
  4. Step 4: Simplify right side
    156,402.90x = 18,299,183,424.18
  5. Step 5: Solve for x
    x = 18,299,183,424.18/156,402.90
  6. Step 6: Final answer
    x = 117,000.28

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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.