Home / 123,539.50-170,502.80-78,221.69

Finding the Fourth Proportional to 123,539.50, 170,502.80 and 78,221.69

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Solution

The fourth proportional to 123,539.50, 170,502.80 and 78,221.69 is: 107,957.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,539.50 : 170,502.80 = 78,221.69 : x
  2. Step 2: Convert to fraction form
    123,539.50/170,502.80 = 78,221.69/x
  3. Step 3: Cross multiply
    123,539.50x = 170,502.80 × 78,221.69
  4. Step 4: Simplify right side
    123,539.50x = 13,337,017,165.73
  5. Step 5: Solve for x
    x = 13,337,017,165.73/123,539.50
  6. Step 6: Final answer
    x = 107,957.51

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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.