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Finding the Fourth Proportional to 75,405.87, 113,070.06 and 39,886.29

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Solution

The fourth proportional to 75,405.87, 113,070.06 and 39,886.29 is: 59,808.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,405.87 : 113,070.06 = 39,886.29 : x
  2. Step 2: Convert to fraction form
    75,405.87/113,070.06 = 39,886.29/x
  3. Step 3: Cross multiply
    75,405.87x = 113,070.06 × 39,886.29
  4. Step 4: Simplify right side
    75,405.87x = 4,509,945,203.48
  5. Step 5: Solve for x
    x = 4,509,945,203.48/75,405.87
  6. Step 6: Final answer
    x = 59,808.94

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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.