Home / 71,985.75-99,340.43-40,156.68

Finding the Fourth Proportional to 71,985.75, 99,340.43 and 40,156.68

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Solution

The fourth proportional to 71,985.75, 99,340.43 and 40,156.68 is: 55,416.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,985.75 : 99,340.43 = 40,156.68 : x
  2. Step 2: Convert to fraction form
    71,985.75/99,340.43 = 40,156.68/x
  3. Step 3: Cross multiply
    71,985.75x = 99,340.43 × 40,156.68
  4. Step 4: Simplify right side
    71,985.75x = 3,989,181,657.79
  5. Step 5: Solve for x
    x = 3,989,181,657.79/71,985.75
  6. Step 6: Final answer
    x = 55,416.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.