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Finding the Fourth Proportional to 47,070.68, 70,704.48 and 39,689.60

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Solution

The fourth proportional to 47,070.68, 70,704.48 and 39,689.60 is: 59,617.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,070.68 : 70,704.48 = 39,689.60 : x
  2. Step 2: Convert to fraction form
    47,070.68/70,704.48 = 39,689.60/x
  3. Step 3: Cross multiply
    47,070.68x = 70,704.48 × 39,689.60
  4. Step 4: Simplify right side
    47,070.68x = 2,806,232,529.41
  5. Step 5: Solve for x
    x = 2,806,232,529.41/47,070.68
  6. Step 6: Final answer
    x = 59,617.42

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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.