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Finding the Fourth Proportional to 113,390.40, 156,506.40 and 68,692.80

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Solution

The fourth proportional to 113,390.40, 156,506.40 and 68,692.80 is: 94,812.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,390.40 : 156,506.40 = 68,692.80 : x
  2. Step 2: Convert to fraction form
    113,390.40/156,506.40 = 68,692.80/x
  3. Step 3: Cross multiply
    113,390.40x = 156,506.40 × 68,692.80
  4. Step 4: Simplify right side
    113,390.40x = 10,750,862,833.92
  5. Step 5: Solve for x
    x = 10,750,862,833.92/113,390.40
  6. Step 6: Final answer
    x = 94,812.81

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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.