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Finding the Fourth Proportional to 53,120.70, 79,689.71 and 15,684.56

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Solution

The fourth proportional to 53,120.70, 79,689.71 and 15,684.56 is: 23,529.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,120.70 : 79,689.71 = 15,684.56 : x
  2. Step 2: Convert to fraction form
    53,120.70/79,689.71 = 15,684.56/x
  3. Step 3: Cross multiply
    53,120.70x = 79,689.71 × 15,684.56
  4. Step 4: Simplify right side
    53,120.70x = 1,249,897,899.05
  5. Step 5: Solve for x
    x = 1,249,897,899.05/53,120.70
  6. Step 6: Final answer
    x = 23,529.39

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1.5x scale

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.