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Finding the Fourth Proportional to 70,931.39, 106,325.28 and 45,987.26

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Solution

The fourth proportional to 70,931.39, 106,325.28 and 45,987.26 is: 68,934.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,931.39 : 106,325.28 = 45,987.26 : x
  2. Step 2: Convert to fraction form
    70,931.39/106,325.28 = 45,987.26/x
  3. Step 3: Cross multiply
    70,931.39x = 106,325.28 × 45,987.26
  4. Step 4: Simplify right side
    70,931.39x = 4,889,607,764.31
  5. Step 5: Solve for x
    x = 4,889,607,764.31/70,931.39
  6. Step 6: Final answer
    x = 68,934.33

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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.