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Finding the Fourth Proportional to 70,437.36, 105,655.16 and 17,129.64

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Solution

The fourth proportional to 70,437.36, 105,655.16 and 17,129.64 is: 25,694.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,437.36 : 105,655.16 = 17,129.64 : x
  2. Step 2: Convert to fraction form
    70,437.36/105,655.16 = 17,129.64/x
  3. Step 3: Cross multiply
    70,437.36x = 105,655.16 × 17,129.64
  4. Step 4: Simplify right side
    70,437.36x = 1,809,834,854.94
  5. Step 5: Solve for x
    x = 1,809,834,854.94/70,437.36
  6. Step 6: Final answer
    x = 25,694.25

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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.