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Finding the Fourth Proportional to 52,129.95, 71,939.71 and 28,256.79

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Solution

The fourth proportional to 52,129.95, 71,939.71 and 28,256.79 is: 38,994.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,129.95 : 71,939.71 = 28,256.79 : x
  2. Step 2: Convert to fraction form
    52,129.95/71,939.71 = 28,256.79/x
  3. Step 3: Cross multiply
    52,129.95x = 71,939.71 × 28,256.79
  4. Step 4: Simplify right side
    52,129.95x = 2,032,785,278.13
  5. Step 5: Solve for x
    x = 2,032,785,278.13/52,129.95
  6. Step 6: Final answer
    x = 38,994.58

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1.5x scale

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.