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Finding the Fourth Proportional to 210,661.07, 290,713.30 and 115,167.76

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Solution

The fourth proportional to 210,661.07, 290,713.30 and 115,167.76 is: 158,932.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,661.07 : 290,713.30 = 115,167.76 : x
  2. Step 2: Convert to fraction form
    210,661.07/290,713.30 = 115,167.76/x
  3. Step 3: Cross multiply
    210,661.07x = 290,713.30 × 115,167.76
  4. Step 4: Simplify right side
    210,661.07x = 33,480,799,693.98
  5. Step 5: Solve for x
    x = 33,480,799,693.98/210,661.07
  6. Step 6: Final answer
    x = 158,932.07

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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.