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Finding the Fourth Proportional to 45,681.16, 68,531.32 and 19,385.32

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Solution

The fourth proportional to 45,681.16, 68,531.32 and 19,385.32 is: 29,082.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,681.16 : 68,531.32 = 19,385.32 : x
  2. Step 2: Convert to fraction form
    45,681.16/68,531.32 = 19,385.32/x
  3. Step 3: Cross multiply
    45,681.16x = 68,531.32 × 19,385.32
  4. Step 4: Simplify right side
    45,681.16x = 1,328,501,568.22
  5. Step 5: Solve for x
    x = 1,328,501,568.22/45,681.16
  6. Step 6: Final answer
    x = 29,082.05

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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.