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Finding the Fourth Proportional to 74,689.41, 103,076.48 and 45,630.21

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Solution

The fourth proportional to 74,689.41, 103,076.48 and 45,630.21 is: 62,972.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,689.41 : 103,076.48 = 45,630.21 : x
  2. Step 2: Convert to fraction form
    74,689.41/103,076.48 = 45,630.21/x
  3. Step 3: Cross multiply
    74,689.41x = 103,076.48 × 45,630.21
  4. Step 4: Simplify right side
    74,689.41x = 4,703,401,428.46
  5. Step 5: Solve for x
    x = 4,703,401,428.46/74,689.41
  6. Step 6: Final answer
    x = 62,972.80

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1.5x scale

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.