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Finding the Fourth Proportional to 57,820.80, 79,700.40 and 47,192.16

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Solution

The fourth proportional to 57,820.80, 79,700.40 and 47,192.16 is: 65,049.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,820.80 : 79,700.40 = 47,192.16 : x
  2. Step 2: Convert to fraction form
    57,820.80/79,700.40 = 47,192.16/x
  3. Step 3: Cross multiply
    57,820.80x = 79,700.40 × 47,192.16
  4. Step 4: Simplify right side
    57,820.80x = 3,761,234,028.86
  5. Step 5: Solve for x
    x = 3,761,234,028.86/57,820.80
  6. Step 6: Final answer
    x = 65,049.84

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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.