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Finding the Fourth Proportional to 101,143.15, 139,544.26 and 65,354.25

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Solution

The fourth proportional to 101,143.15, 139,544.26 and 65,354.25 is: 90,167.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,143.15 : 139,544.26 = 65,354.25 : x
  2. Step 2: Convert to fraction form
    101,143.15/139,544.26 = 65,354.25/x
  3. Step 3: Cross multiply
    101,143.15x = 139,544.26 × 65,354.25
  4. Step 4: Simplify right side
    101,143.15x = 9,119,810,454.11
  5. Step 5: Solve for x
    x = 9,119,810,454.11/101,143.15
  6. Step 6: Final answer
    x = 90,167.36

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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.