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Finding the Fourth Proportional to 100,886.50, 139,223.37 and 58,469.64

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Solution

The fourth proportional to 100,886.50, 139,223.37 and 58,469.64 is: 80,688.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,886.50 : 139,223.37 = 58,469.64 : x
  2. Step 2: Convert to fraction form
    100,886.50/139,223.37 = 58,469.64/x
  3. Step 3: Cross multiply
    100,886.50x = 139,223.37 × 58,469.64
  4. Step 4: Simplify right side
    100,886.50x = 8,140,340,323.49
  5. Step 5: Solve for x
    x = 8,140,340,323.49/100,886.50
  6. Step 6: Final answer
    x = 80,688.10

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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.