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Finding the Fourth Proportional to 61,813.90, 92,728.10 and 19,679.23

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Solution

The fourth proportional to 61,813.90, 92,728.10 and 19,679.23 is: 29,521.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,813.90 : 92,728.10 = 19,679.23 : x
  2. Step 2: Convert to fraction form
    61,813.90/92,728.10 = 19,679.23/x
  3. Step 3: Cross multiply
    61,813.90x = 92,728.10 × 19,679.23
  4. Step 4: Simplify right side
    61,813.90x = 1,824,817,607.36
  5. Step 5: Solve for x
    x = 1,824,817,607.36/61,813.90
  6. Step 6: Final answer
    x = 29,521.15

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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.