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Finding the Fourth Proportional to 57,809.31, 79,748.19 and 45,039.66

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Solution

The fourth proportional to 57,809.31, 79,748.19 and 45,039.66 is: 62,132.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,809.31 : 79,748.19 = 45,039.66 : x
  2. Step 2: Convert to fraction form
    57,809.31/79,748.19 = 45,039.66/x
  3. Step 3: Cross multiply
    57,809.31x = 79,748.19 × 45,039.66
  4. Step 4: Simplify right side
    57,809.31x = 3,591,831,363.22
  5. Step 5: Solve for x
    x = 3,591,831,363.22/57,809.31
  6. Step 6: Final answer
    x = 62,132.40

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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.