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Finding the Fourth Proportional to 65,720.70, 98,581.05 and 57,944.70

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Solution

The fourth proportional to 65,720.70, 98,581.05 and 57,944.70 is: 86,917.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,720.70 : 98,581.05 = 57,944.70 : x
  2. Step 2: Convert to fraction form
    65,720.70/98,581.05 = 57,944.70/x
  3. Step 3: Cross multiply
    65,720.70x = 98,581.05 × 57,944.70
  4. Step 4: Simplify right side
    65,720.70x = 5,712,249,367.94
  5. Step 5: Solve for x
    x = 5,712,249,367.94/65,720.70
  6. Step 6: Final answer
    x = 86,917.05

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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.