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Finding the Fourth Proportional to 45,411.60, 68,068.80 and 20,447.40

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Solution

The fourth proportional to 45,411.60, 68,068.80 and 20,447.40 is: 30,649.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,411.60 : 68,068.80 = 20,447.40 : x
  2. Step 2: Convert to fraction form
    45,411.60/68,068.80 = 20,447.40/x
  3. Step 3: Cross multiply
    45,411.60x = 68,068.80 × 20,447.40
  4. Step 4: Simplify right side
    45,411.60x = 1,391,829,981.12
  5. Step 5: Solve for x
    x = 1,391,829,981.12/45,411.60
  6. Step 6: Final answer
    x = 30,649.22

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1.5x scale

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.