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Finding the Fourth Proportional to 210,809.52, 316,168.48 and 66,726.54

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Solution

The fourth proportional to 210,809.52, 316,168.48 and 66,726.54 is: 100,075.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,809.52 : 316,168.48 = 66,726.54 : x
  2. Step 2: Convert to fraction form
    210,809.52/316,168.48 = 66,726.54/x
  3. Step 3: Cross multiply
    210,809.52x = 316,168.48 × 66,726.54
  4. Step 4: Simplify right side
    210,809.52x = 21,096,828,727.46
  5. Step 5: Solve for x
    x = 21,096,828,727.46/210,809.52
  6. Step 6: Final answer
    x = 100,075.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.