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Finding the Fourth Proportional to 108,521.40, 162,935.70 and 85,174.20

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Solution

The fourth proportional to 108,521.40, 162,935.70 and 85,174.20 is: 127,881.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,521.40 : 162,935.70 = 85,174.20 : x
  2. Step 2: Convert to fraction form
    108,521.40/162,935.70 = 85,174.20/x
  3. Step 3: Cross multiply
    108,521.40x = 162,935.70 × 85,174.20
  4. Step 4: Simplify right side
    108,521.40x = 13,877,917,898.94
  5. Step 5: Solve for x
    x = 13,877,917,898.94/108,521.40
  6. Step 6: Final answer
    x = 127,881.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.