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Finding the Fourth Proportional to 100,959.57, 139,324.76 and 57,935.64

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Solution

The fourth proportional to 100,959.57, 139,324.76 and 57,935.64 is: 79,951.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,959.57 : 139,324.76 = 57,935.64 : x
  2. Step 2: Convert to fraction form
    100,959.57/139,324.76 = 57,935.64/x
  3. Step 3: Cross multiply
    100,959.57x = 139,324.76 × 57,935.64
  4. Step 4: Simplify right side
    100,959.57x = 8,071,869,138.45
  5. Step 5: Solve for x
    x = 8,071,869,138.45/100,959.57
  6. Step 6: Final answer
    x = 79,951.50

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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.