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Finding the Fourth Proportional to 103,475.71, 155,322.16 and 91,704.79

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Solution

The fourth proportional to 103,475.71, 155,322.16 and 91,704.79 is: 137,653.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,475.71 : 155,322.16 = 91,704.79 : x
  2. Step 2: Convert to fraction form
    103,475.71/155,322.16 = 91,704.79/x
  3. Step 3: Cross multiply
    103,475.71x = 155,322.16 × 91,704.79
  4. Step 4: Simplify right side
    103,475.71x = 14,243,786,030.04
  5. Step 5: Solve for x
    x = 14,243,786,030.04/103,475.71
  6. Step 6: Final answer
    x = 137,653.42

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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.