Home / 139,335.08-192,294.27-78,916.47

Finding the Fourth Proportional to 139,335.08, 192,294.27 and 78,916.47

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Solution

The fourth proportional to 139,335.08, 192,294.27 and 78,916.47 is: 108,911.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,335.08 : 192,294.27 = 78,916.47 : x
  2. Step 2: Convert to fraction form
    139,335.08/192,294.27 = 78,916.47/x
  3. Step 3: Cross multiply
    139,335.08x = 192,294.27 × 78,916.47
  4. Step 4: Simplify right side
    139,335.08x = 15,175,185,470.36
  5. Step 5: Solve for x
    x = 15,175,185,470.36/139,335.08
  6. Step 6: Final answer
    x = 108,911.45

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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.