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Finding the Fourth Proportional to 77,390.51, 106,800.12 and 43,406.55

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Solution

The fourth proportional to 77,390.51, 106,800.12 and 43,406.55 is: 59,901.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,390.51 : 106,800.12 = 43,406.55 : x
  2. Step 2: Convert to fraction form
    77,390.51/106,800.12 = 43,406.55/x
  3. Step 3: Cross multiply
    77,390.51x = 106,800.12 × 43,406.55
  4. Step 4: Simplify right side
    77,390.51x = 4,635,824,748.79
  5. Step 5: Solve for x
    x = 4,635,824,748.79/77,390.51
  6. Step 6: Final answer
    x = 59,901.73

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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.