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Finding the Fourth Proportional to 60,880.88, 91,312.72 and 20,899.22

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Solution

The fourth proportional to 60,880.88, 91,312.72 and 20,899.22 is: 31,345.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,880.88 : 91,312.72 = 20,899.22 : x
  2. Step 2: Convert to fraction form
    60,880.88/91,312.72 = 20,899.22/x
  3. Step 3: Cross multiply
    60,880.88x = 91,312.72 × 20,899.22
  4. Step 4: Simplify right side
    60,880.88x = 1,908,364,115.27
  5. Step 5: Solve for x
    x = 1,908,364,115.27/60,880.88
  6. Step 6: Final answer
    x = 31,345.87

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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.