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Finding the Fourth Proportional to 342,590.78, 513,920.40 and 117,921.49

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Solution

The fourth proportional to 342,590.78, 513,920.40 and 117,921.49 is: 176,894.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,590.78 : 513,920.40 = 117,921.49 : x
  2. Step 2: Convert to fraction form
    342,590.78/513,920.40 = 117,921.49/x
  3. Step 3: Cross multiply
    342,590.78x = 513,920.40 × 117,921.49
  4. Step 4: Simplify right side
    342,590.78x = 60,602,257,582.39
  5. Step 5: Solve for x
    x = 60,602,257,582.39/342,590.78
  6. Step 6: Final answer
    x = 176,894.01

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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.