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Finding the Fourth Proportional to 92,571.84, 138,840.16 and 45,139.32

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Solution

The fourth proportional to 92,571.84, 138,840.16 and 45,139.32 is: 67,700.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,571.84 : 138,840.16 = 45,139.32 : x
  2. Step 2: Convert to fraction form
    92,571.84/138,840.16 = 45,139.32/x
  3. Step 3: Cross multiply
    92,571.84x = 138,840.16 × 45,139.32
  4. Step 4: Simplify right side
    92,571.84x = 6,267,150,411.09
  5. Step 5: Solve for x
    x = 6,267,150,411.09/92,571.84
  6. Step 6: Final answer
    x = 67,700.40

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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.