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Finding the Fourth Proportional to 210,308.09, 290,215.04 and 119,655.59

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Solution

The fourth proportional to 210,308.09, 290,215.04 and 119,655.59 is: 165,118.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,308.09 : 290,215.04 = 119,655.59 : x
  2. Step 2: Convert to fraction form
    210,308.09/290,215.04 = 119,655.59/x
  3. Step 3: Cross multiply
    210,308.09x = 290,215.04 × 119,655.59
  4. Step 4: Simplify right side
    210,308.09x = 34,725,849,788.72
  5. Step 5: Solve for x
    x = 34,725,849,788.72/210,308.09
  6. Step 6: Final answer
    x = 165,118.95

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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.