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Finding the Fourth Proportional to 210,720.30, 316,080.45 and 60,965.48

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Solution

The fourth proportional to 210,720.30, 316,080.45 and 60,965.48 is: 91,448.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,720.30 : 316,080.45 = 60,965.48 : x
  2. Step 2: Convert to fraction form
    210,720.30/316,080.45 = 60,965.48/x
  3. Step 3: Cross multiply
    210,720.30x = 316,080.45 × 60,965.48
  4. Step 4: Simplify right side
    210,720.30x = 19,269,994,772.46
  5. Step 5: Solve for x
    x = 19,269,994,772.46/210,720.30
  6. Step 6: Final answer
    x = 91,448.21

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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.