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Finding the Fourth Proportional to 210,539.80, 290,561.48 and 119,899.59

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Solution

The fourth proportional to 210,539.80, 290,561.48 and 119,899.59 is: 165,470.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,539.80 : 290,561.48 = 119,899.59 : x
  2. Step 2: Convert to fraction form
    210,539.80/290,561.48 = 119,899.59/x
  3. Step 3: Cross multiply
    210,539.80x = 290,561.48 × 119,899.59
  4. Step 4: Simplify right side
    210,539.80x = 34,838,202,321.79
  5. Step 5: Solve for x
    x = 34,838,202,321.79/210,539.80
  6. Step 6: Final answer
    x = 165,470.86

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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.