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Finding the Fourth Proportional to 112,371.40, 168,492.30 and 42,257.80

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Solution

The fourth proportional to 112,371.40, 168,492.30 and 42,257.80 is: 63,362.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,371.40 : 168,492.30 = 42,257.80 : x
  2. Step 2: Convert to fraction form
    112,371.40/168,492.30 = 42,257.80/x
  3. Step 3: Cross multiply
    112,371.40x = 168,492.30 × 42,257.80
  4. Step 4: Simplify right side
    112,371.40x = 7,120,113,914.94
  5. Step 5: Solve for x
    x = 7,120,113,914.94/112,371.40
  6. Step 6: Final answer
    x = 63,362.33

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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.