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Finding the Fourth Proportional to 65,872.93, 98,812.13 and 19,125.81

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Solution

The fourth proportional to 65,872.93, 98,812.13 and 19,125.81 is: 28,689.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,872.93 : 98,812.13 = 19,125.81 : x
  2. Step 2: Convert to fraction form
    65,872.93/98,812.13 = 19,125.81/x
  3. Step 3: Cross multiply
    65,872.93x = 98,812.13 × 19,125.81
  4. Step 4: Simplify right side
    65,872.93x = 1,889,862,024.08
  5. Step 5: Solve for x
    x = 1,889,862,024.08/65,872.93
  6. Step 6: Final answer
    x = 28,689.51

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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.