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Finding the Fourth Proportional to 60,872.16, 91,290.96 and 19,318.08

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Solution

The fourth proportional to 60,872.16, 91,290.96 and 19,318.08 is: 28,971.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,872.16 : 91,290.96 = 19,318.08 : x
  2. Step 2: Convert to fraction form
    60,872.16/91,290.96 = 19,318.08/x
  3. Step 3: Cross multiply
    60,872.16x = 91,290.96 × 19,318.08
  4. Step 4: Simplify right side
    60,872.16x = 1,763,566,068.56
  5. Step 5: Solve for x
    x = 1,763,566,068.56/60,872.16
  6. Step 6: Final answer
    x = 28,971.64

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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.