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Finding the Fourth Proportional to 77,421.80, 106,837.70 and 45,600.96

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Solution

The fourth proportional to 77,421.80, 106,837.70 and 45,600.96 is: 62,926.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,421.80 : 106,837.70 = 45,600.96 : x
  2. Step 2: Convert to fraction form
    77,421.80/106,837.70 = 45,600.96/x
  3. Step 3: Cross multiply
    77,421.80x = 106,837.70 × 45,600.96
  4. Step 4: Simplify right side
    77,421.80x = 4,871,901,684.19
  5. Step 5: Solve for x
    x = 4,871,901,684.19/77,421.80
  6. Step 6: Final answer
    x = 62,926.74

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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.