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Finding the Fourth Proportional to 108,101.60, 149,137.32 and 72,234.80

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Solution

The fourth proportional to 108,101.60, 149,137.32 and 72,234.80 is: 99,655.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,101.60 : 149,137.32 = 72,234.80 : x
  2. Step 2: Convert to fraction form
    108,101.60/149,137.32 = 72,234.80/x
  3. Step 3: Cross multiply
    108,101.60x = 149,137.32 × 72,234.80
  4. Step 4: Simplify right side
    108,101.60x = 10,772,904,482.74
  5. Step 5: Solve for x
    x = 10,772,904,482.74/108,101.60
  6. Step 6: Final answer
    x = 99,655.37

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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.