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Finding the Fourth Proportional to 100,912.92, 139,258.08 and 58,475.40

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Solution

The fourth proportional to 100,912.92, 139,258.08 and 58,475.40 is: 80,695.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,912.92 : 139,258.08 = 58,475.40 : x
  2. Step 2: Convert to fraction form
    100,912.92/139,258.08 = 58,475.40/x
  3. Step 3: Cross multiply
    100,912.92x = 139,258.08 × 58,475.40
  4. Step 4: Simplify right side
    100,912.92x = 8,143,171,931.23
  5. Step 5: Solve for x
    x = 8,143,171,931.23/100,912.92
  6. Step 6: Final answer
    x = 80,695.04

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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.