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Finding the Fourth Proportional to 108,692.10, 149,926.06 and 78,521.76

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Solution

The fourth proportional to 108,692.10, 149,926.06 and 78,521.76 is: 108,310.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,692.10 : 149,926.06 = 78,521.76 : x
  2. Step 2: Convert to fraction form
    108,692.10/149,926.06 = 78,521.76/x
  3. Step 3: Cross multiply
    108,692.10x = 149,926.06 × 78,521.76
  4. Step 4: Simplify right side
    108,692.10x = 11,772,458,101.07
  5. Step 5: Solve for x
    x = 11,772,458,101.07/108,692.10
  6. Step 6: Final answer
    x = 108,310.15

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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.