Home / 210,172.98-315,402.27-85,536.66

Finding the Fourth Proportional to 210,172.98, 315,402.27 and 85,536.66

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Solution

The fourth proportional to 210,172.98, 315,402.27 and 85,536.66 is: 128,363.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,172.98 : 315,402.27 = 85,536.66 : x
  2. Step 2: Convert to fraction form
    210,172.98/315,402.27 = 85,536.66/x
  3. Step 3: Cross multiply
    210,172.98x = 315,402.27 × 85,536.66
  4. Step 4: Simplify right side
    210,172.98x = 26,978,456,732.22
  5. Step 5: Solve for x
    x = 26,978,456,732.22/210,172.98
  6. Step 6: Final answer
    x = 128,363.11

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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.