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Finding the Fourth Proportional to 90,692.47, 125,147.01 and 84,005.11

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Solution

The fourth proportional to 90,692.47, 125,147.01 and 84,005.11 is: 115,919.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,692.47 : 125,147.01 = 84,005.11 : x
  2. Step 2: Convert to fraction form
    90,692.47/125,147.01 = 84,005.11/x
  3. Step 3: Cross multiply
    90,692.47x = 125,147.01 × 84,005.11
  4. Step 4: Simplify right side
    90,692.47x = 10,512,988,341.22
  5. Step 5: Solve for x
    x = 10,512,988,341.22/90,692.47
  6. Step 6: Final answer
    x = 115,919.09

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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.