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Finding the Fourth Proportional to 123,493.60, 170,421.99 and 66,904.98

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Solution

The fourth proportional to 123,493.60, 170,421.99 and 66,904.98 is: 92,329.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,493.60 : 170,421.99 = 66,904.98 : x
  2. Step 2: Convert to fraction form
    123,493.60/170,421.99 = 66,904.98/x
  3. Step 3: Cross multiply
    123,493.60x = 170,421.99 × 66,904.98
  4. Step 4: Simplify right side
    123,493.60x = 11,402,078,645.88
  5. Step 5: Solve for x
    x = 11,402,078,645.88/123,493.60
  6. Step 6: Final answer
    x = 92,329.31

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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.