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Finding the Fourth Proportional to 53,287.40, 79,931.10 and 45,770.60

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Solution

The fourth proportional to 53,287.40, 79,931.10 and 45,770.60 is: 68,655.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,287.40 : 79,931.10 = 45,770.60 : x
  2. Step 2: Convert to fraction form
    53,287.40/79,931.10 = 45,770.60/x
  3. Step 3: Cross multiply
    53,287.40x = 79,931.10 × 45,770.60
  4. Step 4: Simplify right side
    53,287.40x = 3,658,494,405.66
  5. Step 5: Solve for x
    x = 3,658,494,405.66/53,287.40
  6. Step 6: Final answer
    x = 68,655.90

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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.