Home / 101,720.48-140,427.14-79,008.62

Finding the Fourth Proportional to 101,720.48, 140,427.14 and 79,008.62

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Solution

The fourth proportional to 101,720.48, 140,427.14 and 79,008.62 is: 109,072.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,720.48 : 140,427.14 = 79,008.62 : x
  2. Step 2: Convert to fraction form
    101,720.48/140,427.14 = 79,008.62/x
  3. Step 3: Cross multiply
    101,720.48x = 140,427.14 × 79,008.62
  4. Step 4: Simplify right side
    101,720.48x = 11,094,953,444.77
  5. Step 5: Solve for x
    x = 11,094,953,444.77/101,720.48
  6. Step 6: Final answer
    x = 109,072.96

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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.