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Finding the Fourth Proportional to 70,069.51, 105,141.17 and 40,508.11

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Solution

The fourth proportional to 70,069.51, 105,141.17 and 40,508.11 is: 60,783.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,069.51 : 105,141.17 = 40,508.11 : x
  2. Step 2: Convert to fraction form
    70,069.51/105,141.17 = 40,508.11/x
  3. Step 3: Cross multiply
    70,069.51x = 105,141.17 × 40,508.11
  4. Step 4: Simplify right side
    70,069.51x = 4,259,070,079.89
  5. Step 5: Solve for x
    x = 4,259,070,079.89/70,069.51
  6. Step 6: Final answer
    x = 60,783.50

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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.