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Finding the Fourth Proportional to 57,008.10, 78,620.07 and 47,479.62

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Solution

The fourth proportional to 57,008.10, 78,620.07 and 47,479.62 is: 65,479.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,008.10 : 78,620.07 = 47,479.62 : x
  2. Step 2: Convert to fraction form
    57,008.10/78,620.07 = 47,479.62/x
  3. Step 3: Cross multiply
    57,008.10x = 78,620.07 × 47,479.62
  4. Step 4: Simplify right side
    57,008.10x = 3,732,851,047.97
  5. Step 5: Solve for x
    x = 3,732,851,047.97/57,008.10
  6. Step 6: Final answer
    x = 65,479.31

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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.