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Finding the Fourth Proportional to 53,312.94, 79,969.80 and 20,040.54

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Solution

The fourth proportional to 53,312.94, 79,969.80 and 20,040.54 is: 30,060.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,312.94 : 79,969.80 = 20,040.54 : x
  2. Step 2: Convert to fraction form
    53,312.94/79,969.80 = 20,040.54/x
  3. Step 3: Cross multiply
    53,312.94x = 79,969.80 × 20,040.54
  4. Step 4: Simplify right side
    53,312.94x = 1,602,637,975.69
  5. Step 5: Solve for x
    x = 1,602,637,975.69/53,312.94
  6. Step 6: Final answer
    x = 30,060.96

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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.