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Finding the Fourth Proportional to 70,015.79, 105,023.70 and 17,425.28

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Solution

The fourth proportional to 70,015.79, 105,023.70 and 17,425.28 is: 26,137.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,015.79 : 105,023.70 = 17,425.28 : x
  2. Step 2: Convert to fraction form
    70,015.79/105,023.70 = 17,425.28/x
  3. Step 3: Cross multiply
    70,015.79x = 105,023.70 × 17,425.28
  4. Step 4: Simplify right side
    70,015.79x = 1,830,066,854.02
  5. Step 5: Solve for x
    x = 1,830,066,854.02/70,015.79
  6. Step 6: Final answer
    x = 26,137.92

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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.