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Finding the Fourth Proportional to 103,716.68, 143,130.84 and 61,275.11

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Solution

The fourth proportional to 103,716.68, 143,130.84 and 61,275.11 is: 84,560.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,716.68 : 143,130.84 = 61,275.11 : x
  2. Step 2: Convert to fraction form
    103,716.68/143,130.84 = 61,275.11/x
  3. Step 3: Cross multiply
    103,716.68x = 143,130.84 × 61,275.11
  4. Step 4: Simplify right side
    103,716.68x = 8,770,357,965.39
  5. Step 5: Solve for x
    x = 8,770,357,965.39/103,716.68
  6. Step 6: Final answer
    x = 84,560.73

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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.