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Finding the Fourth Proportional to 53,697.79, 74,111.03 and 38,640.30

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Solution

The fourth proportional to 53,697.79, 74,111.03 and 38,640.30 is: 53,329.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,697.79 : 74,111.03 = 38,640.30 : x
  2. Step 2: Convert to fraction form
    53,697.79/74,111.03 = 38,640.30/x
  3. Step 3: Cross multiply
    53,697.79x = 74,111.03 × 38,640.30
  4. Step 4: Simplify right side
    53,697.79x = 2,863,672,432.51
  5. Step 5: Solve for x
    x = 2,863,672,432.51/53,697.79
  6. Step 6: Final answer
    x = 53,329.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.