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Finding the Fourth Proportional to 70,907.76, 97,853.10 and 40,690.68

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Solution

The fourth proportional to 70,907.76, 97,853.10 and 40,690.68 is: 56,153.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,907.76 : 97,853.10 = 40,690.68 : x
  2. Step 2: Convert to fraction form
    70,907.76/97,853.10 = 40,690.68/x
  3. Step 3: Cross multiply
    70,907.76x = 97,853.10 × 40,690.68
  4. Step 4: Simplify right side
    70,907.76x = 3,981,709,179.11
  5. Step 5: Solve for x
    x = 3,981,709,179.11/70,907.76
  6. Step 6: Final answer
    x = 56,153.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.