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Finding the Fourth Proportional to 210,597.12, 290,623.32 and 115,103.76

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Solution

The fourth proportional to 210,597.12, 290,623.32 and 115,103.76 is: 158,842.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,597.12 : 290,623.32 = 115,103.76 : x
  2. Step 2: Convert to fraction form
    210,597.12/290,623.32 = 115,103.76/x
  3. Step 3: Cross multiply
    210,597.12x = 290,623.32 × 115,103.76
  4. Step 4: Simplify right side
    210,597.12x = 33,451,836,875.68
  5. Step 5: Solve for x
    x = 33,451,836,875.68/210,597.12
  6. Step 6: Final answer
    x = 158,842.80

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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.