Home / 210,936.50-316,437.61-68,748.78

Finding the Fourth Proportional to 210,936.50, 316,437.61 and 68,748.78

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Solution

The fourth proportional to 210,936.50, 316,437.61 and 68,748.78 is: 103,133.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,936.50 : 316,437.61 = 68,748.78 : x
  2. Step 2: Convert to fraction form
    210,936.50/316,437.61 = 68,748.78/x
  3. Step 3: Cross multiply
    210,936.50x = 316,437.61 × 68,748.78
  4. Step 4: Simplify right side
    210,936.50x = 21,754,700,303.16
  5. Step 5: Solve for x
    x = 21,754,700,303.16/210,936.50
  6. Step 6: Final answer
    x = 103,133.88

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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.