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Finding the Fourth Proportional to 77,320.76, 106,700.84 and 45,491.72

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Solution

The fourth proportional to 77,320.76, 106,700.84 and 45,491.72 is: 62,777.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,320.76 : 106,700.84 = 45,491.72 : x
  2. Step 2: Convert to fraction form
    77,320.76/106,700.84 = 45,491.72/x
  3. Step 3: Cross multiply
    77,320.76x = 106,700.84 × 45,491.72
  4. Step 4: Simplify right side
    77,320.76x = 4,854,004,737.04
  5. Step 5: Solve for x
    x = 4,854,004,737.04/77,320.76
  6. Step 6: Final answer
    x = 62,777.51

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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.