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Finding the Fourth Proportional to 49,695.60, 74,543.40 and 16,420.80

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Solution

The fourth proportional to 49,695.60, 74,543.40 and 16,420.80 is: 24,631.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,695.60 : 74,543.40 = 16,420.80 : x
  2. Step 2: Convert to fraction form
    49,695.60/74,543.40 = 16,420.80/x
  3. Step 3: Cross multiply
    49,695.60x = 74,543.40 × 16,420.80
  4. Step 4: Simplify right side
    49,695.60x = 1,224,062,262.72
  5. Step 5: Solve for x
    x = 1,224,062,262.72/49,695.60
  6. Step 6: Final answer
    x = 24,631.20

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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.