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Finding the Fourth Proportional to 210,780.62, 290,887.90 and 124,788.95

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Solution

The fourth proportional to 210,780.62, 290,887.90 and 124,788.95 is: 172,215.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,780.62 : 290,887.90 = 124,788.95 : x
  2. Step 2: Convert to fraction form
    210,780.62/290,887.90 = 124,788.95/x
  3. Step 3: Cross multiply
    210,780.62x = 290,887.90 × 124,788.95
  4. Step 4: Simplify right side
    210,780.62x = 36,299,593,842.29
  5. Step 5: Solve for x
    x = 36,299,593,842.29/210,780.62
  6. Step 6: Final answer
    x = 172,215.05

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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.