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Finding the Fourth Proportional to 100,899.37, 139,189.03 and 65,032.57

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Solution

The fourth proportional to 100,899.37, 139,189.03 and 65,032.57 is: 89,711.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,899.37 : 139,189.03 = 65,032.57 : x
  2. Step 2: Convert to fraction form
    100,899.37/139,189.03 = 65,032.57/x
  3. Step 3: Cross multiply
    100,899.37x = 139,189.03 × 65,032.57
  4. Step 4: Simplify right side
    100,899.37x = 9,051,820,713.92
  5. Step 5: Solve for x
    x = 9,051,820,713.92/100,899.37
  6. Step 6: Final answer
    x = 89,711.37

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1.5x scale

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.