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Finding the Fourth Proportional to 247,387.79, 341,384.67 and 139,959.65

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Solution

The fourth proportional to 247,387.79, 341,384.67 and 139,959.65 is: 193,138.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,387.79 : 341,384.67 = 139,959.65 : x
  2. Step 2: Convert to fraction form
    247,387.79/341,384.67 = 139,959.65/x
  3. Step 3: Cross multiply
    247,387.79x = 341,384.67 × 139,959.65
  4. Step 4: Simplify right side
    247,387.79x = 47,780,078,928.57
  5. Step 5: Solve for x
    x = 47,780,078,928.57/247,387.79
  6. Step 6: Final answer
    x = 193,138.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.