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Finding the Fourth Proportional to 101,436.12, 139,934.66 and 65,637.68

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Solution

The fourth proportional to 101,436.12, 139,934.66 and 65,637.68 is: 90,549.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,436.12 : 139,934.66 = 65,637.68 : x
  2. Step 2: Convert to fraction form
    101,436.12/139,934.66 = 65,637.68/x
  3. Step 3: Cross multiply
    101,436.12x = 139,934.66 × 65,637.68
  4. Step 4: Simplify right side
    101,436.12x = 9,184,986,433.99
  5. Step 5: Solve for x
    x = 9,184,986,433.99/101,436.12
  6. Step 6: Final answer
    x = 90,549.47

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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.