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Finding the Fourth Proportional to 77,456.80, 106,913.28 and 45,635.95

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Solution

The fourth proportional to 77,456.80, 106,913.28 and 45,635.95 is: 62,991.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,456.80 : 106,913.28 = 45,635.95 : x
  2. Step 2: Convert to fraction form
    77,456.80/106,913.28 = 45,635.95/x
  3. Step 3: Cross multiply
    77,456.80x = 106,913.28 × 45,635.95
  4. Step 4: Simplify right side
    77,456.80x = 4,879,089,100.42
  5. Step 5: Solve for x
    x = 4,879,089,100.42/77,456.80
  6. Step 6: Final answer
    x = 62,991.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.