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Finding the Fourth Proportional to 140,756.64, 211,137.64 and 45,987.08

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Solution

The fourth proportional to 140,756.64, 211,137.64 and 45,987.08 is: 68,981.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,756.64 : 211,137.64 = 45,987.08 : x
  2. Step 2: Convert to fraction form
    140,756.64/211,137.64 = 45,987.08/x
  3. Step 3: Cross multiply
    140,756.64x = 211,137.64 × 45,987.08
  4. Step 4: Simplify right side
    140,756.64x = 9,709,603,541.69
  5. Step 5: Solve for x
    x = 9,709,603,541.69/140,756.64
  6. Step 6: Final answer
    x = 68,981.50

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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.