Home / 99,539.51-149,221.10-71,388.77

Finding the Fourth Proportional to 99,539.51, 149,221.10 and 71,388.77

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Solution

The fourth proportional to 99,539.51, 149,221.10 and 71,388.77 is: 107,019.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,539.51 : 149,221.10 = 71,388.77 : x
  2. Step 2: Convert to fraction form
    99,539.51/149,221.10 = 71,388.77/x
  3. Step 3: Cross multiply
    99,539.51x = 149,221.10 × 71,388.77
  4. Step 4: Simplify right side
    99,539.51x = 10,652,710,219.41
  5. Step 5: Solve for x
    x = 10,652,710,219.41/99,539.51
  6. Step 6: Final answer
    x = 107,019.92

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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.