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Finding the Fourth Proportional to 74,986.80, 112,492.80 and 22,401.60

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Solution

The fourth proportional to 74,986.80, 112,492.80 and 22,401.60 is: 33,606.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,986.80 : 112,492.80 = 22,401.60 : x
  2. Step 2: Convert to fraction form
    74,986.80/112,492.80 = 22,401.60/x
  3. Step 3: Cross multiply
    74,986.80x = 112,492.80 × 22,401.60
  4. Step 4: Simplify right side
    74,986.80x = 2,520,018,708.48
  5. Step 5: Solve for x
    x = 2,520,018,708.48/74,986.80
  6. Step 6: Final answer
    x = 33,606.16

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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.