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Finding the Fourth Proportional to 342,145.80, 513,218.70 and 105,467.40

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Solution

The fourth proportional to 342,145.80, 513,218.70 and 105,467.40 is: 158,201.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,145.80 : 513,218.70 = 105,467.40 : x
  2. Step 2: Convert to fraction form
    342,145.80/513,218.70 = 105,467.40/x
  3. Step 3: Cross multiply
    342,145.80x = 513,218.70 × 105,467.40
  4. Step 4: Simplify right side
    342,145.80x = 54,127,841,920.38
  5. Step 5: Solve for x
    x = 54,127,841,920.38/342,145.80
  6. Step 6: Final answer
    x = 158,201.10

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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.