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Finding the Fourth Proportional to 213,881.80, 320,822.70 and 56,126.20

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Solution

The fourth proportional to 213,881.80, 320,822.70 and 56,126.20 is: 84,189.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,881.80 : 320,822.70 = 56,126.20 : x
  2. Step 2: Convert to fraction form
    213,881.80/320,822.70 = 56,126.20/x
  3. Step 3: Cross multiply
    213,881.80x = 320,822.70 × 56,126.20
  4. Step 4: Simplify right side
    213,881.80x = 18,006,559,024.74
  5. Step 5: Solve for x
    x = 18,006,559,024.74/213,881.80
  6. Step 6: Final answer
    x = 84,189.30

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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.