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Finding the Fourth Proportional to 73,812.96, 110,703.12 and 21,210.72

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Solution

The fourth proportional to 73,812.96, 110,703.12 and 21,210.72 is: 31,811.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,812.96 : 110,703.12 = 21,210.72 : x
  2. Step 2: Convert to fraction form
    73,812.96/110,703.12 = 21,210.72/x
  3. Step 3: Cross multiply
    73,812.96x = 110,703.12 × 21,210.72
  4. Step 4: Simplify right side
    73,812.96x = 2,348,092,881.45
  5. Step 5: Solve for x
    x = 2,348,092,881.45/73,812.96
  6. Step 6: Final answer
    x = 31,811.39

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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.