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Finding the Fourth Proportional to 52,130.54, 78,195.81 and 12,687.65

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Solution

The fourth proportional to 52,130.54, 78,195.81 and 12,687.65 is: 19,031.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,130.54 : 78,195.81 = 12,687.65 : x
  2. Step 2: Convert to fraction form
    52,130.54/78,195.81 = 12,687.65/x
  3. Step 3: Cross multiply
    52,130.54x = 78,195.81 × 12,687.65
  4. Step 4: Simplify right side
    52,130.54x = 992,121,068.75
  5. Step 5: Solve for x
    x = 992,121,068.75/52,130.54
  6. Step 6: Final answer
    x = 19,031.48

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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.