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Finding the Fourth Proportional to 70,411.79, 105,617.85 and 17,103.53

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Solution

The fourth proportional to 70,411.79, 105,617.85 and 17,103.53 is: 25,655.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,411.79 : 105,617.85 = 17,103.53 : x
  2. Step 2: Convert to fraction form
    70,411.79/105,617.85 = 17,103.53/x
  3. Step 3: Cross multiply
    70,411.79x = 105,617.85 × 17,103.53
  4. Step 4: Simplify right side
    70,411.79x = 1,806,437,980.49
  5. Step 5: Solve for x
    x = 1,806,437,980.49/70,411.79
  6. Step 6: Final answer
    x = 25,655.33

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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.