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Finding the Fourth Proportional to 342,078.60, 513,117.90 and 142,332.60

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Solution

The fourth proportional to 342,078.60, 513,117.90 and 142,332.60 is: 213,498.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,078.60 : 513,117.90 = 142,332.60 : x
  2. Step 2: Convert to fraction form
    342,078.60/513,117.90 = 142,332.60/x
  3. Step 3: Cross multiply
    342,078.60x = 513,117.90 × 142,332.60
  4. Step 4: Simplify right side
    342,078.60x = 73,033,404,813.54
  5. Step 5: Solve for x
    x = 73,033,404,813.54/342,078.60
  6. Step 6: Final answer
    x = 213,498.90

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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.