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Finding the Fourth Proportional to 61,776, 92,679.48 and 28,519.32

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Solution

The fourth proportional to 61,776, 92,679.48 and 28,519.32 is: 42,786.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,776 : 92,679.48 = 28,519.32 : x
  2. Step 2: Convert to fraction form
    61,776/92,679.48 = 28,519.32/x
  3. Step 3: Cross multiply
    61,776x = 92,679.48 × 28,519.32
  4. Step 4: Simplify right side
    61,776x = 2,643,155,747.55
  5. Step 5: Solve for x
    x = 2,643,155,747.55/61,776
  6. Step 6: Final answer
    x = 42,786.13

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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.