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Finding the Fourth Proportional to 77,281, 106,648.86 and 45,014.77

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Solution

The fourth proportional to 77,281, 106,648.86 and 45,014.77 is: 62,121.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,281 : 106,648.86 = 45,014.77 : x
  2. Step 2: Convert to fraction form
    77,281/106,648.86 = 45,014.77/x
  3. Step 3: Cross multiply
    77,281x = 106,648.86 × 45,014.77
  4. Step 4: Simplify right side
    77,281x = 4,800,773,903.66
  5. Step 5: Solve for x
    x = 4,800,773,903.66/77,281
  6. Step 6: Final answer
    x = 62,121.01

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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.