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Finding the Fourth Proportional to 210,666.16, 315,999.56 and 84,363.28

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Solution

The fourth proportional to 210,666.16, 315,999.56 and 84,363.28 is: 126,545.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,666.16 : 315,999.56 = 84,363.28 : x
  2. Step 2: Convert to fraction form
    210,666.16/315,999.56 = 84,363.28/x
  3. Step 3: Cross multiply
    210,666.16x = 315,999.56 × 84,363.28
  4. Step 4: Simplify right side
    210,666.16x = 26,658,759,360.16
  5. Step 5: Solve for x
    x = 26,658,759,360.16/210,666.16
  6. Step 6: Final answer
    x = 126,545.05

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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.