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Finding the Fourth Proportional to 52,139.80, 71,953.02 and 28,266.40

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Solution

The fourth proportional to 52,139.80, 71,953.02 and 28,266.40 is: 39,007.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,139.80 : 71,953.02 = 28,266.40 : x
  2. Step 2: Convert to fraction form
    52,139.80/71,953.02 = 28,266.40/x
  3. Step 3: Cross multiply
    52,139.80x = 71,953.02 × 28,266.40
  4. Step 4: Simplify right side
    52,139.80x = 2,033,852,844.53
  5. Step 5: Solve for x
    x = 2,033,852,844.53/52,139.80
  6. Step 6: Final answer
    x = 39,007.68

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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.