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Finding the Fourth Proportional to 100,918.92, 139,264.47 and 58,469.25

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Solution

The fourth proportional to 100,918.92, 139,264.47 and 58,469.25 is: 80,685.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,918.92 : 139,264.47 = 58,469.25 : x
  2. Step 2: Convert to fraction form
    100,918.92/139,264.47 = 58,469.25/x
  3. Step 3: Cross multiply
    100,918.92x = 139,264.47 × 58,469.25
  4. Step 4: Simplify right side
    100,918.92x = 8,142,689,112.55
  5. Step 5: Solve for x
    x = 8,142,689,112.55/100,918.92
  6. Step 6: Final answer
    x = 80,685.46

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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.