Home / 100,735.20-139,024.76-57,720.40

Finding the Fourth Proportional to 100,735.20, 139,024.76 and 57,720.40

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Solution

The fourth proportional to 100,735.20, 139,024.76 and 57,720.40 is: 79,659.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,735.20 : 139,024.76 = 57,720.40 : x
  2. Step 2: Convert to fraction form
    100,735.20/139,024.76 = 57,720.40/x
  3. Step 3: Cross multiply
    100,735.20x = 139,024.76 × 57,720.40
  4. Step 4: Simplify right side
    100,735.20x = 8,024,564,607.96
  5. Step 5: Solve for x
    x = 8,024,564,607.96/100,735.20
  6. Step 6: Final answer
    x = 79,659.98

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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.