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Finding the Fourth Proportional to 53,700.72, 80,531.91 and 20,411.93

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Solution

The fourth proportional to 53,700.72, 80,531.91 and 20,411.93 is: 30,610.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,700.72 : 80,531.91 = 20,411.93 : x
  2. Step 2: Convert to fraction form
    53,700.72/80,531.91 = 20,411.93/x
  3. Step 3: Cross multiply
    53,700.72x = 80,531.91 × 20,411.93
  4. Step 4: Simplify right side
    53,700.72x = 1,643,811,307.03
  5. Step 5: Solve for x
    x = 1,643,811,307.03/53,700.72
  6. Step 6: Final answer
    x = 30,610.60

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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.