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Finding the Fourth Proportional to 74,868.40, 112,302.60 and 68,744.80

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Solution

The fourth proportional to 74,868.40, 112,302.60 and 68,744.80 is: 103,117.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,868.40 : 112,302.60 = 68,744.80 : x
  2. Step 2: Convert to fraction form
    74,868.40/112,302.60 = 68,744.80/x
  3. Step 3: Cross multiply
    74,868.40x = 112,302.60 × 68,744.80
  4. Step 4: Simplify right side
    74,868.40x = 7,720,219,776.48
  5. Step 5: Solve for x
    x = 7,720,219,776.48/74,868.40
  6. Step 6: Final answer
    x = 103,117.20

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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.