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Finding the Fourth Proportional to 70,402.12, 105,603.60 and 17,811.58

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Solution

The fourth proportional to 70,402.12, 105,603.60 and 17,811.58 is: 26,717.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,402.12 : 105,603.60 = 17,811.58 : x
  2. Step 2: Convert to fraction form
    70,402.12/105,603.60 = 17,811.58/x
  3. Step 3: Cross multiply
    70,402.12x = 105,603.60 × 17,811.58
  4. Step 4: Simplify right side
    70,402.12x = 1,880,966,969.69
  5. Step 5: Solve for x
    x = 1,880,966,969.69/70,402.12
  6. Step 6: Final answer
    x = 26,717.48

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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.