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Finding the Fourth Proportional to 210,577.60, 315,589.76 and 99,801.28

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Solution

The fourth proportional to 210,577.60, 315,589.76 and 99,801.28 is: 149,570.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,577.60 : 315,589.76 = 99,801.28 : x
  2. Step 2: Convert to fraction form
    210,577.60/315,589.76 = 99,801.28/x
  3. Step 3: Cross multiply
    210,577.60x = 315,589.76 × 99,801.28
  4. Step 4: Simplify right side
    210,577.60x = 31,496,262,002.89
  5. Step 5: Solve for x
    x = 31,496,262,002.89/210,577.60
  6. Step 6: Final answer
    x = 149,570.81

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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.