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Finding the Fourth Proportional to 104,428.30, 156,642.45 and 68,998.90

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Solution

The fourth proportional to 104,428.30, 156,642.45 and 68,998.90 is: 103,498.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,428.30 : 156,642.45 = 68,998.90 : x
  2. Step 2: Convert to fraction form
    104,428.30/156,642.45 = 68,998.90/x
  3. Step 3: Cross multiply
    104,428.30x = 156,642.45 × 68,998.90
  4. Step 4: Simplify right side
    104,428.30x = 10,808,156,743.31
  5. Step 5: Solve for x
    x = 10,808,156,743.31/104,428.30
  6. Step 6: Final answer
    x = 103,498.35

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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.