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Finding the Fourth Proportional to 210,655.26, 315,917.13 and 70,381.08

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Solution

The fourth proportional to 210,655.26, 315,917.13 and 70,381.08 is: 105,549.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,655.26 : 315,917.13 = 70,381.08 : x
  2. Step 2: Convert to fraction form
    210,655.26/315,917.13 = 70,381.08/x
  3. Step 3: Cross multiply
    210,655.26x = 315,917.13 × 70,381.08
  4. Step 4: Simplify right side
    210,655.26x = 22,234,588,799.90
  5. Step 5: Solve for x
    x = 22,234,588,799.90/210,655.26
  6. Step 6: Final answer
    x = 105,549.65

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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.