Home / 52,132.34-78,198.64-12,689.40

Finding the Fourth Proportional to 52,132.34, 78,198.64 and 12,689.40

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Solution

The fourth proportional to 52,132.34, 78,198.64 and 12,689.40 is: 19,034.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,132.34 : 78,198.64 = 12,689.40 : x
  2. Step 2: Convert to fraction form
    52,132.34/78,198.64 = 12,689.40/x
  3. Step 3: Cross multiply
    52,132.34x = 78,198.64 × 12,689.40
  4. Step 4: Simplify right side
    52,132.34x = 992,293,822.42
  5. Step 5: Solve for x
    x = 992,293,822.42/52,132.34
  6. Step 6: Final answer
    x = 19,034.13

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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.