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Finding the Fourth Proportional to 90,692.90, 124,825.86 and 79,866.91

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Solution

The fourth proportional to 90,692.90, 124,825.86 and 79,866.91 is: 109,925.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,692.90 : 124,825.86 = 79,866.91 : x
  2. Step 2: Convert to fraction form
    90,692.90/124,825.86 = 79,866.91/x
  3. Step 3: Cross multiply
    90,692.90x = 124,825.86 × 79,866.91
  4. Step 4: Simplify right side
    90,692.90x = 9,969,455,882.32
  5. Step 5: Solve for x
    x = 9,969,455,882.32/90,692.90
  6. Step 6: Final answer
    x = 109,925.43

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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.