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Finding the Fourth Proportional to 72,303, 108,451.35 and 19,712.34

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Solution

The fourth proportional to 72,303, 108,451.35 and 19,712.34 is: 29,567.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,303 : 108,451.35 = 19,712.34 : x
  2. Step 2: Convert to fraction form
    72,303/108,451.35 = 19,712.34/x
  3. Step 3: Cross multiply
    72,303x = 108,451.35 × 19,712.34
  4. Step 4: Simplify right side
    72,303x = 2,137,829,884.66
  5. Step 5: Solve for x
    x = 2,137,829,884.66/72,303
  6. Step 6: Final answer
    x = 29,567.65

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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.