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Finding the Fourth Proportional to 71,777.70, 107,666.55 and 45,512.10

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Solution

The fourth proportional to 71,777.70, 107,666.55 and 45,512.10 is: 68,268.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,777.70 : 107,666.55 = 45,512.10 : x
  2. Step 2: Convert to fraction form
    71,777.70/107,666.55 = 45,512.10/x
  3. Step 3: Cross multiply
    71,777.70x = 107,666.55 × 45,512.10
  4. Step 4: Simplify right side
    71,777.70x = 4,900,130,790.26
  5. Step 5: Solve for x
    x = 4,900,130,790.26/71,777.70
  6. Step 6: Final answer
    x = 68,268.15

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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.